AMORPHOUS AND CRYSTALLINE FORMS OF VALBENAZINE SALT

Abstract

The present invention relates to amorphous and crystalline forms of valbenazine salt and the methods for their preparation.

Claims

1. An oxalate salt of L-Valine, (2R,3R,11bR)-1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-yl ester in a crystalline form selected from the group consisting of Form A1, Form A2, Form A3, Form A4 and Form A5.

2. (canceled)

3. (canceled)

4. The oxalate salt of claim 1, wherein the crystalline form is Form A1 having an X-ray powder diffraction pattern comprising peaks at 5.4, 7.1 and 13.4 degrees two theta±0.2 theta using λ at 1.54 A.

5. The oxalate salt of claim 1, wherein the crystalline form is Form A2 having an X-ray powder diffraction pattern comprising peaks at 15.1, 20.2 and 20.6 degrees two theta±0.2 theta using λ at 1.54 A.

6. The oxalate salt of claim 1, wherein the crystalline form is Form A3 having an X-ray powder diffraction pattern comprising peaks at 6.7, 7.1 and 9.5 degrees two theta±0.2 theta using λ at 1.54 A.

7. The oxalate salt of claim 1, wherein the crystalline form is Form A4 having an X-ray powder diffraction pattern comprising peaks at 5.5, 8.8 and 12.7 degrees two theta±0.2 theta using λ at 1.54 A.

8. The oxalate salt of claim 1, wherein the crystalline form is Form A5 having an X-ray powder diffraction pattern comprising peaks at 3.4, 6.1 and 7.0, degrees two theta±0.2 theta using λ at 1.54 A.

9. A hydrobromide salt of L-Valine, (2R,3R,11bR)-1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-yl ester in amorphous form.

10. (canceled)

11. A L-tartrate salt of L-Valine, (2R,3R,11bR)-1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-yl ester in a crystalline form.

12. (canceled)

13. The L-tartrate salt of claim 11, wherein the crystalline form is Form B.

14. The L-tartrate salt of claim 13, wherein Form B has an X-ray powder diffraction pattern comprising peaks at 9.8, 11.0 and 14.2 degrees two theta±0.2 theta using λ at 1.54 A.

15. A Di-p-toluoyl-L-tartrate salt of L-Valine, (2R,3R,11bR)-1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-yl ester.

16. The Di-p-toluoyl-L-tartrate salt of claim 15, wherein the salt is in a crystalline form.

17. The Di-p-toluoyl-L-tartrate salt of claim 16, wherein the crystalline form is Form C.

18. The Di-p-toluoyl-L-tartrate salt of claim 17, wherein Form C has an X-ray powder diffraction pattern comprising peaks at 5.4, 6.6 and 14.0 degrees two theta±0.2 theta using λ at 1.54 A.

19. A D-tartrate salt of L-Valine, (2R,3R,11bR)-1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-yl ester.

20. The D-tartrate salt of claim 19, wherein the salt is in a crystalline form.

21. The D-tartrate salt of claim 20, wherein the crystalline form is Form D.

22. The D-tartrate salt of claim 21, wherein Form D has an X-ray powder diffraction pattern comprising peaks at 6.7, 7.8 and 18.2 degrees two theta±0.2 theta using λ at 1.54 A.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1. Exemplary XRPD pattern of crystalline Form A1 of valbenazine oxalate.

[0021] FIG. 2. Exemplary XRPD pattern of amorphous of valbenazine hydrobromide.

[0022] FIG. 3. Exemplary XRPD pattern of crystalline Form B of valbenazine L-tartrate.

[0023] FIG. 4. Exemplary XRPD pattern of crystalline Form C of valbenazine Di-p-toluoyl-L-tartrate.

[0024] FIG. 5. Exemplary XRPD pattern of crystalline Form D of valbenazine D-tartrate.

[0025] FIG. 6. Exemplary DSC curve of crystalline Form A1 of valbenazine oxalate.

[0026] FIG. 7. Exemplary DSC curve of amorphous of valbenazine hydrobromide.

[0027] FIG. 8. Exemplary DSC curve of crystalline Form B of valbenazine L-tartrate.

[0028] FIG. 9. Exemplary DSC curve of crystalline Form C of valbenazine Di-p-toluoyl-L-tartrate.

[0029] FIG. 1.0. Exemplary DSC curve of crystalline Form D of valbenazine D-tartrate.

[0030] FIG. 11. Exemplary XRPD pattern of crystalline Form A2 of valbenazine oxalate.

[0031] FIG. 12, Exemplary XRPD pattern of crystalline Form A3 of valbenazine oxalate.

[0032] FIG. 13. Exemplary XRPD pattern of crystalline Form A4 of valbenazine oxalate.

[0033] FIG. 14. Exemplary XRPD pattern of crystalline Form A5 of valbenazine oxalate.

[0034] FIG. 15. Exemplary DSC curve of crystalline Form A2 of valbenazine oxalate.

[0035] FIG. 16, Exemplary DSC curve of crystalline Form A3 of valbenazine oxalate.

[0036] FIG. 17. Exemplary DSC curve of crystalline Form A4 of valbenazine oxalate.

[0037] FIG. 18. Exemplary DSC curve of crystalline Form A5 of valbenazine oxalate.

[0038] FIG. 19. Exemplary XRPD pattern of crystalline Form X of valbenazine.

[0039] FIG. 20, Exemplary DSC curve of crystalline Form X of valbenazine.

DETAILED DESCRIPTION

[0040] One aspect of the present application relates to crystalline forms of valbenazine oxalate designated herein as Form A1, Form A2, Form A3, Form A4 and Form A5 and processes for preparation thereof.

[0041] Crystalline Form A1, Form A2, Form A3, Form A4 and Form A5 of valbenazine oxalate may be characterized by any one or more analytical techniques, which include XRPD patterns and differential scanning calorimetry (DSC) curves.

[0042] In an embodiment, the present invention provides crystalline Form A1 of valbenazine oxalate characterized by a XRPD pattern depicted in FIG. 1 comprising peaks at 2-theta angles of about 5.4°±0.2°, 7.1°±0.2°, 13.4°±0.2°.

[0043] In another aspect, crystalline Form A1 of valbenazine oxalate was characterized by a DSC profile in accordance with the profile shown in FIG. 6 in an embodiment, the present invention provides crystalline Form A2 of valbenazine oxalate characterized by a XRPD pattern depicted in FIG. 11 comprising peaks at 2-theta angles of about, 15.1°±0.2°, 20.2°±0.2°, 20.6°±0.2°.

[0044] In another aspect, crystalline Form A2 of valbenazine oxalate was characterized by a DSC profile in accordance with the profile shown in FIG. 15

[0045] In an embodiment, the present invention provides crystalline Form A3 of valbenazine oxalate characterized by a XRPD pattern depicted in FIG. 12 comprising peaks at 2-theta angles of about 6.7°±0.2°, 7.1°±0.2°, 9.5°±0.2°.

[0046] In another aspect, crystalline Form A3 of valbenazine oxalate was characterized by a DSC profile in accordance with the profile shown in FIG. 16

[0047] In an embodiment, the present invention provides crystalline Form A4 of valbenazine oxalate characterized by a XRPD pattern depicted in FIG. 13 comprising peaks at 2-theta angles of about 5.5°±0.2°, 8.8°±0.2°, 12.7°±0.2°.

[0048] In another aspect, crystalline Form A4 of valbenazine oxalate was characterized by a DSC profile in accordance with the profile shown in FIG. 17

[0049] In an embodiment, the present invention provides crystalline Form A5 of valbenazine oxalate characterized by a XRPD pattern depicted in FIG. 14 comprising peaks at 2-theta angles of about 3.4°±0.2′, 6.1°±0.2°, 7.0°±0.2°.

[0050] In another aspect, crystalline Form A5 of valbenazine oxalate was characterized by a DSC profile in accordance with the profile shown in FIG. 18

[0051] The other aspect of the present application relates to amorphous of valbenazine hydrobromide and the processes for preparation thereof.

[0052] Amorphous of valbenazine hydrobromide may be characterized by XRPD patterns depicted in FIG. 2, and DSC in FIG. 7

[0053] The other aspect of the present application relates to crystalline forms of valbenazine L-tartrate designated herein as Form B and the processes for preparation thereof.

[0054] Crystalline Form B of valbenazine L-tartrate may be characterized by any one or more analytical techniques, which include XRPD patterns and differential scanning calorimetry (DSC) curves.

[0055] In an embodiment, the present invention provides crystalline Form B of valbenazine L-tartrate characterized by a XRPD pattern depicted in FIG. 3 comprising peaks at 2-theta angles of about 9.8°±0.2°, 11.0°±0.2°, 14.2°±0.2°.

[0056] In another aspect, crystalline Form B of valbenazine L-tartrate was characterized by a DSC profile in accordance with the profile shown in FIG. 8

[0057] The other aspect of the present application relates to crystalline form of valbenazine Di-p-toluoyl-L-tartrate designated herein as Form C and the processes for the preparation thereof.

[0058] Crystalline Form C of valbenazine Di-p-toluoyl-L-tartrate may be characterized by any one or more analytical techniques, which include XRPD patterns and differential scanning calorimetry (DSC) curves.

[0059] In an embodiment, the present invention provides crystalline Form C of valbenazine Di-p-toluoyl-L-tartrate characterized by a XRPD pattern depicted in FIG. 4 comprising peaks at 2-theta angles of about 5.4°±0.2°, 6.6°±0.2°, 14.0°±0.2°.

[0060] In another aspect, crystalline Form C of valbenazine Di-p-toluoyl-L-tartrate was characterized by a DSC profile in accordance with the profile shown in FIG. 9

[0061] The other aspect of the present application relates to crystalline form of valbenazine D-tartrate designated herein as Form D and processes for preparation thereof.

[0062] Crystalline Form D of valbenazine D-tartrate may be characterized by any one or more analytical techniques, which include XRPD patterns and differential scanning calorimetry (DSC) curves.

[0063] In an embodiment, the present invention provides crystalline Form D of valbenazine D-tartrate characterized by a XRPD pattern depicted in FIG. 5 comprising peaks at 2-theta angles of about 6.7°±0.2°, 7.8°±0.2°, 18.2°±0.2°.

[0064] In another aspect, crystalline Form D of valbenazine D-tartrate was characterized by a DSC profile in accordance with the profile shown in FIG. 10

[0065] The other one aspect of the present application relates to crystalline form of valbenazine designated herein as Form X and processes for the preparation thereof.

[0066] Crystalline Form X of valbenazine may be characterized by any one or more analytical techniques, which include XRPD patterns and differential scanning calorimetry (DSC) curves.

[0067] In an embodiment, the present invention provides crystalline Form X of valbenazine characterized by a XRPD pattern depicted in FIG. 19 comprising peaks at 2-theta angles of about 5.9°±0.2°, 6.7°±0.2°, 9.8°±0.2°, 18.0°±0.2°.

[0068] In another aspect, crystalline Form X of valbenazine is characterized by a DSC profile in accordance with the profile shown in FIG. 20

[0069] The crystalline phases, isolated by the methods of the present application can be analyzed by Powder X-ray Diffraction (XRPD) was performed on a PANalytical Empyrean X-ray Powder Diffractometer, equipped with a Cu-anode (λ=1.54 A), X-ray source operated at 45 kV, 40 mA, and Start Position [°2Th.]: 3.0056; End Position [°2Th.]: 39.9906; Step Size [°2Th.]: 0.0167; Scan Step Time [s]: 17.8500; K-Alpha1 [Å]: 1.54060; K-Alpha2 [Å]: 1.54443.

[0070] The DSC profiles were registered using a TA200 DSC instrument. The sample was weighed in an aluminum pan sealed with a pierced aluminum cover. The analysis was performed heating the sample from 25° C. to 300° C.

EXAMPLES

Example 1

Preparation of Compound I Oxalate Crystalline Form A1

[0071] A solution of compound I (6.06 g, purity: 97.5%) in DCM (120 mL) was concentrated to about 15 mL under vacuum. After solvent exchange to isopropyl acetate (IPAc), the IPAc solution was heated to 40-50° C., followed by drop-wise addition of a solution of anhydrous oxalic acid (1.0 eq) in IPAc (4 volume) at 40-50° C. After being stirred and held for 2-3 h at 40-50° C., the mixture was cooled to 20-30° C. and stirred for 1-2 h. The resulting suspension was filtered. The cake was washed with IPAc, and dried to afford valbenazine oxalate as an off-white solid. (6.63 g, purity: 99.4%, yield: 90%). .sup.1H-NMR (DMSO-d.sub.6, 400 MHz) δ: 8.04 (4H, brs, active hydrogen), 6.88 (2H, 2s, ArH), 4.76 (1H, td, J=9.8 Hz, 4.8 Hz), 3.78 (1H, d, J=6.4 Hz), 3.71 (6H, —OCH.sub.3), 3.37 (1H, m), 3.11 (1H, m), 3.05 (1H, m), 2.91 (1H, m), 2.59 (2H, m), 2.48 (1H, m), 2.17 (2H, m), 1.89 (1H, m), 1.63 (1H, m), 1.46 (1H, m), 1.27 (1H, m), 1.03 (1H, m), 0.98 (6H, dd, J=6.8 Hz, 9.2 Hz, -iPr), 0.87 (6H, dd, J=5.6 Hz, 11.6 Hz, -iPr). The XRPD pattern of crystalline form A1 was shown in table 1.

TABLE-US-00001 TABLE 1 2theta d spacing Intensity % 5.38 16.43 100.00 7.14 12.38 31.66 8.50 10.40 50.93 10.50 8.43 18.54 12.10 7.31 24.98 13.41 6.60 56.19 13.81 6.41 40.02 17.08 5.19 15.47 19.20 4.62 26.81 20.71 4.29 17.72

Example 2

Preparation of Compound I Oxalate Crystalline Form A2

[0072] A solid of compound I (1.5 g, purity: 98.8%) was added IPAc (30 mL), follow by addition of anhydrous oxalic acid 322 mg (1 eq). The mixture was heated to 50-60° C. and stirred for about 20-30 min, cooled to 20-30° C. and stirred for 16 h. The resulting suspension was filtered. The cake was washed with IPAc, and dried to afford valbenazine oxalate as an off-white solid. (780 mg, purity: 99.7%, yield: 43%). The XRPD pattern of crystalline form A2 was shown in table 2.

TABLE-US-00002 TABLE 2 2theta d spacing Intensity % 8.82 10.02 43.51 13.19 6.71 65.15 13.77 6.43 23.03 15.52 6.10 26.71 15.07 5.88 100.00 16.12 5.50 55.53 16.46 5.39 28.97 19.32 4.60 33.21 20.16 4.41 97.45 20.58 4.32 67.86 21.68 4.10 43.42 22.54 3.94 28.95 22.80 3.90 29.09

Example 3

Preparation of Compound I Oxalate Crystalline Form A3

[0073] A solution of compound I (2.57 g, purity: 97.5%) in DCM (60 mL) was mixed with anhydrous oxalic acid (1.0 eq). The mixture was heated to reflux for 2 h. The mixture was cooled to 20-30° C. and stirred for 16-20 h. The resulting suspension was filtered. The cake was washed with DCM, and dried to afford valbenazine oxalate as an off-white solid. (2.87 g, purity: 99.4%, yield: 92%). The XRPD pattern of crystalline form A3 was shown in table 3.

TABLE-US-00003 TABLE 3 2theta d spacing Intensity % 4.73 18.70 11.66 6.69 13.22 100.00 7.06 12.51 48.60 9.50 9.31 48.07 13.61 6.51 33.75 14.41 6.14 45.45 16.75 5.29 16.64 17.40 5.10 37.07 17.95 4.94 23.89 18.65 4.76 16.76 19.35 4.59 13.80 20.30 4.38 26.51 21.02 4.23 35.80 21.64 4.11 15.98 22.66 3.92 19.04 23.16 3.84 11.47 24.26 3.67 19.11 29.19 3.06 11.89

Example 4

Preparation of Compound I Oxalate Crystalline Form A3

[0074] A solid of compound I (1.5 g, purity: 98.8%) was added DCM (30 mL), follow by addition of anhydrous oxalic acid 322 mg (1 eq). After being stirred and held for 4 h at 20-30° C., the resulting suspension was filtered. The cake was washed with DCM, and dried to afford valbenazine oxalate as an off-white solid. (1 g, purity: 99.7%, yield: 55%). The XRPD pattern of crystalline form A3 was shown in table 4.

TABLE-US-00004 TABLE 4 2theta d spacing Intensity % 4.67 18.90 11.39 6.62 13.34 100.00 7.01 12.61 80.20 7.33 12.07 66.93 9.50 9.31 39.45 11.50 7.69 13.31 11.94 7.41 29.01 13.52 6.55 26.57 14.26 6.21 14.62 17.30 5.13 35.72 17.67 5.02 13.92 17.98 4.93 34.70 18.55 4.78 11.21 20.23 4.39 32.13 21.03 4.22 41.29 21.63 4.11 13.36

Example 5

Preparation of Compound I Oxalate Crystalline Form A4

[0075] A solution of compound I (5.2 g, HPLC purity: 97.4%) in DCM (50 mL) was concentrated to about 15 mL under vacuum. After solvent exchange to acetonitrile (MeCN), the solution (total volume about 45 mL) was heated to 40-50° C., followed by drop-wise addition of a solution of anhydrous oxalic acid in MeCN (1.0 eq anhydrous oxalic acid in 3 vol MeCN) at 40-50° C. After being stirred and held for 1-2 h at 40-50° C., the mixture was cooled to 20-30° C. and stirred for 17 h. The resulting suspension was filtered. The cake was washed with MeCN, and dried to afford valbenazine oxalate as an off-white solid. (5.27 g, purity: 99.6%, yield: 83.4%). The XRPD pattern of crystalline form A4 was shown in table 5.

TABLE-US-00005 TABLE 5 2theta d spacing Intensity % 3.83 23.05 12.77 5.27 16.78 100.00 8.30 10.65 43.86 8.65 10.23 60.77 11.05 8.01 11.23 11.83 7.48 30.10 12.45 7.11 41.45 13.61 6.50 37.43 14.08 6.29 33.31 16.08 5.51 14.05 17.03 5.21 47.68 17.92 4.95 13.09 18.67 4.75 23.08 19.11 4.64 18.76 19.58 4.53 20.54 19.98 4.44 42.56

Example 6

Preparation of Compound I Oxalate Crystalline Form A4

[0076] A solution of compound I (5.69 g, HPLC purity: 95.63%) in DCM (90 mL) was concentrated under vacuum. MeCN (130 mL) was added. The MeCN solution was heated to 40-50° C., followed by drop-wise addition of a solution of anhydrous oxalic acid in MeCN (1.0 eq anhydrous oxalic acid in 3 vol MeCN) at 40-50° C. After being stirred and held for 0.5 h at 40-50° C., the mixture was cooled to 20-30° C. and stirred for 17 h. The resulting suspension was filtered. The cake was washed with MeCN, and dried to afford valbenazine oxalate as an off-white solid. (6.09 g, purity: 99.66%, yield: 88.13%). The XRPD pattern of crystalline form A4 was shown in table 6.

TABLE-US-00006 TABLE 6 2theta d spacing Intensity % 4.00 22.09 14.81 5.50 16.07 100.00 8.54 10.35 40.14 8.80 10.05 45.29 11.99 7.38 22.23 12.65 7.00 28.59 13.82 6.41 29.09 14.26 6.21 22.67 16.27 5.45 13.04 17.27 5.13 38.76 18.09 4.90 13.10 18.77 4.73 14.99 19.25 4.61 18.73

Example 7

Preparation of Compound I Oxalate Crystalline Form A5

[0077] A solution of compound I (3.8 g, HPLC purity: 93.63%) in DCM (70 mL) was concentrated under vacuum. MeCN (100 mL) was added. The MeCN solution was heated to 40-50° C., followed by drop-wise addition of a solution of anhydrous oxalic acid (1.0 eq anhydrous oxalic acid in 4 vol MeCN) in MeCN at 40-50° C. After being stirred and held for 1.5 h at 40-50° C., the mixture was cooled to 20-30° C. and stirred for 20 h. The resulting suspension was filtered. The cake was washed with MeCN, and dried to afford valbenazine oxalate as an off-white solid. (3.36 g, purity: 99.52%, yield: 72.7%). The XRPD pattern of crystalline form A5 was shown in table 7.

TABLE-US-00007 TABLE 7 2theta d spacing Intensity % 3.39 26.06 44.26 6.05 14.60 25.52 7.04 12.55 100.00 9.40 9.41 11.10 10.40 8.51 8.24 10.74 8.24 15.68 15.77 5.62 15.29 19.28 4.60 20.33 20.47 4.34 13.33 20.76 4.28 10.73

Example 8

Preparation of Compound I Hydrobromide

[0078] A solution of compound I (6.8 g, HPLC purity: 98.02%) in DCM (120 mL) was concentrated to 1-2 vol under vacuum. The solvent was exchanged to IPAc. The IPAc solution (total volume about 75 mL) was cooled to 10-20° C., followed by drop wise addition of a solution of 33 w/w % HBr in AcOH (2.8 g, 2.1 eq). The mixture was heated to 20-30° C. After being stirred and held for 2 h at 20-30° C. The resulting suspension was filtered. The cake was washed with IPAc, and dried to afford valbenazine hydrobromide as a light-yellow solid. (3 g, purity: 95.73%, yield: 31.8%). .sup.1H-NMR (DMSO-d.sub.6, 400 MHz) δ: 6.81 (2H, 2s, ArH), 5.05 (1H, td, J=10.4 Hz, 4.0 Hz), 4.46 (1H, m), 3.95 (1H, d, J=5.2 Hz), 3.75 (6H, —OCH.sub.3), 3.61 (1H, m), 3.54 (1H, m), 3.23 (2H, m), 3.06 (1H, m), 2.89 (2H, m), 2.39 (1H, m), 2.22 (1H, m), 1.90 (1H, m), 1.66 (1H, m), 1.33 (1H, m), 1.10 (1H, m), 1.03 (6H, dd, J=7.2 Hz, 10.0 Hz, -iPr), 0.91 (6H, dd, J=3.6 Hz, 6.4 Hz, -iPr).

Example 9

Preparation of Compound I (−)-Di-p-Toluoyl-L-Tartrate

[0079] A solution of compound I (379.3 mg, HPLC purity: 97.5%) in DCM (11 mL) was added (−)-Di-p-toluoyl-L-tartaric acid (1.0 eq). The solvent was exchanged to IPAc. The resulting suspension (about 45 mL) was heated to 50-60° C. After being stirred and held for 3 h, the mixture was cooled to 20-30° C. The suspension was filtered. The cake was washed with IPAc, and dried to afford valbenazine (−)-Di-p-toluoyl-L-tartrate as a light-yellow solid. (600 mg, purity: 99.2%, yield: 82%). .sup.1H-NMR (DMSO-d.sub.6, 400 MHz) δ: 7.86 (4H, d, J=8.0 Hz, ArH), 7.31 (4H, d, J=8.0 Hz, ArH), 6.64 (2H, 2s, ArH), 5.64 (2H, s), 4.73 (brs, active hydrogen), 4.68 (1H, td, J=4.8 Hz, 10.8 Hz), 3.72 (1H, d, J=4.8 Hz), 3.69 (6H, —OCH.sub.3), 3.29 (1H, brd, J=11.6 Hz), 3.07 (1H, dd, J=4.0 Hz, 12.0 Hz), 3.01 (1H, m), 2.89 (1H, m), 2.56 (1H, m), 2.45 (1H, m), 2.36 (6H, s, ArCH3), 2.09 (2H, m), 1.86 (1H, m), 1.41 (1H, m), 1.23 (1H, m), 0.95 (1H, m), 0.90 (6H, dd, J=5.6 Hz, 6.8 Hz, -iPr), 0.85 (6H, dd, J=6.4 Hz, 10.8 Hz, -iPr).

[0080] The XRPD pattern of crystalline form C was shown in table 8.

TABLE-US-00008 TABLE 8 2theta d spacing Intensity % 5.41 16.35 41.66 6.63 13.32 100.00 7.90 11.20 11.96 10.85 8.15 5.40 13.30 6.66 21.42 13.99 6.33 49.46 15.87 5.59 9.76 16.61 5.34 16.76 18.75 4.73 13.20 20.00 4.44 6.50 22.06 4.03 7.95

Example 10

Preparation of Compound I D-Tartrate

[0081] A solution of compound I (1.52 g, HPLC: 97.49%) in DCM (15 g) was added D-tartaric acid (1.0 eq). The solvent was exchanged to MeCN. The resulting suspension (about 25 mL) was heated to 40-50° C. After being stirred and held for 3 h, the mixture was cooled to 20-30° C. and held for about 16 h. The suspension was filtered. The cake was washed with MeCN, and dried to afford valbenazine D-tartrate as an off-white solid. (1.86 g, purity: 98.59%, yield: 90%). .sup.1H-NMR (DMSO-d.sub.6, 400 MHz) δ: 6.66 (2H, 2s, ArH), 5.82 (brs, active hydrogen), 4.72 (1H, td, J=4.8 Hz, 10.8 Hz), 4.07 (2H, s), 3.70 (6H, —OCH.sub.3), 3.66 (1H, d, J=4.8 Hz), 3.25 (1H, brd, J=11.2 Hz), 3.06 (1H, m), 2.99 (1H, m), 2.90 (1H, m), 2.55 (2H, m), 2.41 (1H, m), 2.11 (2H, m), 1.85 (1H, m), 1.63 (1H, m), 1.41 (1H, m), 1.27 (1H, m), 1.02 (1H, m), 0.97 (6H, dd, J=2.8 Hz, 7.2 Hz, -iPr), 0.87 (6H, dd, J=6.8 Hz, 10.8 Hz, -iPr).

[0082] The XRPD pattern of crystalline form D was shown in table 9.

TABLE-US-00009 TABLE 9 2theta d spacing Intensity % 6.67 13.25 100.00 7.78 11.37 27.17 11.22 7.89 25.53 15.31 5.79 18.14 16.27 5.45 21.12 18.19 4.88 36.31 18.56 4.78 15.58 19.70 4.51 18.01 20.46 4.34 21.55 21.93 4.05 22.35

Example 11

Preparation of Compound I L-(+)-Tartrate

[0083] A solution of compound I (1.52 g, HPLC: 97.49%) in DCM (15 g) was added L-(+)-tartaric acid (1.0 eq). The solvent was exchanged to MeCN. The resulting suspension (about 25 mL) was heated to 40-50° C. After being stirred and held for 3 h, the mixture was cooled to 20-30° C. and held for about 16 h. The suspension was filtered. The cake was washed with MeCN, and dried to afford valbenazine L-tartrate as an off-white solid. (1.7 g, purity: 99.44%, yield: 82.3%). .sup.1H-NMR (DMSO-d.sub.6, 400 MHz) δ: 6.66 (2H, 2s, ArH), 5.82 (brs, active hydrogen), 4.71 (1H, td, J=4.4 Hz, 10.4 Hz), 4.06 (2H, s), 3.70 (6H, —OCH.sub.3), 3.67 (1H, d, J=4.8 Hz), 3.25 (1H, brd, J=11.2 Hz), 3.06 (1H, m), 2.98 (1H, m), 2.90 (1H, m), 2.55 (2H, m), 2.41 (1H, m), 2.11 (2H, m), 1.85 (1H, m), 1.64 (1H, m), 1.40 (1H, m), 1.26 (1H, m), 1.02 (1H, m), 0.97 (6H, dd, J=2.4 Hz, 6.8 Hz, -iPr), 0.87 (6H, dd, J=6.4 Hz, 10.8 Hz, -iPr).

[0084] The XRPD pattern of crystalline form B was shown in table 10.

TABLE-US-00010 TABLE 10 2theta d spacing Intensity % 9.78 9.05 93.46 10.03 8.82 81.91 11.02 8.03 100.00 12.10 7.32 41.31 14.24 6.22 97.47 14.86 5.96 52.35 16.60 5.34 42.97 18.60 477 49.06 20.04 4.43 45.21 21.45 4.14 43.69

Contrast Example 12

Preparation of Compound I Hydrochloride

[0085] A solution of compound I (37.9 g, HPLC: 97.49%) in DCM was concentrated under vacuum. After solvent exchange to MeCN, the solution (total volume about 470 mL) was added drop-wise a solution of HCl-IPA (3.7 M, 52 mL). EtOAc (110 mL) was added. The suspension (about 630 mL) was heated to 45-55° C. After being added a second portion of EtOAc (about 770 mL), the mixture was heated to reflux for 1 h. After being cooled to 20-30° C., the resulting suspension was filtered. The cake was washed with EtOAc, and dried to afford valbenazine hydrochloride as an off-white solid. (36.06 g, purity: 93.03%, yield: 81.03%).

Example 13

Preparation of Compound I Crystalline Form X

[0086] A solution of compound I (15.8 g, HPLC: 99.6%) in DCM (120 mL) was concentrated under vacuum. After solvent exchange to n-hexane, the suspension (about 80 mL) was stirred and held for 2 h at 25-35° C. The resulting suspension was filtered. The cake was washed with n-hexane, and dried to afford valbenazine free base as an off-white solid. (13.14 g, purity: 99.69%, yield: 83.2%). The XRPD pattern of crystalline form X was shown in table 11.

TABLE-US-00011 TABLE 11 2theta d spacing Intensity % 5.92 14.94 58.90 6.67 13.26 56.94 8.30 10.66 22.70 9.85 8.98 100.00 11.94 7.41 8.99 13.43 6.59 29.09 14.12 6.27 74.76 16.31 5.44 7.40 16.72 5.30 30.39 17.99 4.93 56.18 19.80 4.48 7.51 20.15 4.41 53.23 22.16 4.01 5.43 23.83 3.73 5.47

Example 14

Stability Data of Form A1 of Valbenazine Oxalate

[0087]

TABLE-US-00012 Stability HPLC data summary of Form A1 of valbenazine oxalate Store Package The Form A1 of valbenazine oxalate was packaged in double PE bags. Sealed in a laminated aluminum foil bag. Storage conditions 2~8° C. Time 0 months 0.5 months 1 months 3 months Appearance White solid White solid White solid White solid Assay 100.1% 100.8% 101.0% 100.33% (Anhydrous) HPLC Valben- 99.81% 99.84% 99.84% 99.78% azine Imp-1 0.03% LSI 0.03% LSI 0.03% LSI 0.04% LSI Imp-2 0.01% ND 0.01% 0.02% Imp-3 0.02% 0.03% 0.02% 0.04% Imp-4 0.02% ND 0.01% 0.03% Imp-5 0.01% 0.01% 0.01% 0.02% Imp-6 ND ND ND ND Imp-7 0.01% 0.02% 0.01% 0.01% Imp-8 ND ND ND ND Imp-9 ND ND ND ND Chiral Valben- 99.93% 99.93% 99.95% 99.91% HPLC azine Chiral 0.01% 0.01% 0.01% 0.01% imp-1 Chiral 0.04% 0.04% 0.04% 0.07% imp-2 Chiral 0.03% 0.03% ND 0.02% imp-3 Moisture 0.12% 0.2% 0.19% 0.4%

TABLE-US-00013 Stability XRPD data summary of Form A1 of valbenazine oxalate Final solid Initial solid Form condition time Form A1 2-8° C. 3 months A1

Example 15

Purification Capability Data Valbenazine Oxalate Vs Valbenazine Tosylate and Hydrochloride

[0088]

TABLE-US-00014 Purity, Area % Chiral purity, Area % Form Form Form Form A1 A1 Valbenazine A1 Al Batch Batch Valbenazine Batch Batch Batch Valbenazine Valbenazine Entry 1 .sup.1 2 .sup.1 hydrochloride .sup.2 tosylate .sup.3 1 .sup.1 2 .sup.1 hydrochloride .sup.2 tosylate .sup.3 Crude 97.5% 97.4% 97.45% 97.0% 97.4% 98.0% 98.98% 98.98% valbenazine Valbenazine 99.4% 99.6% 93.03% 97.4% 99.8% 99.9% 98.85% 98.85% salt .sup.1 Prepared following the process in example 1; .sup.2 Prepared following the process in WO2017075340 example 14; .sup.3 Prepared following the process in WO2017075340 example 2.