The present disclosure relates to methods of carbon-carbon bond fragmentation.

The present disclosure relates to methods of carbon-carbon bond fragmentation.

The present disclosure provides a benzene fused heterocyclic derivative of Formula (I): is a single or double bond; n is an integer of 0 or 1; A is —CH.sub.2—, —CH(OH)—, or —C(O)—; G is C or N; X is —CH.sub.2—, O, or —C(O)—; Y is alkyl, aryl, or heterocyclic alkyl optionally substituted with at least one substituent independently selected from a group consisting of: H, halogen, alkyl, alkyl substituted with at least one halogen, aryl, aryl substituted with at least one halogen, —NR.sub.y1R.sub.y2, —OR.sub.y1, —R.sub.y1C(O)R.sub.y3, —C(O)R.sub.y1, —C(O)OR.sub.y2, —C(O)OR.sub.y2Ry3, —NR.sub.y1C(O)R.sub.y2, —NR.sub.y1C(O)NR.sub.y2R.sub.y3, —NR.sub.y1C(O)OR.sub.y2R.sub.y3, —NR.sub.y1C(O)R.sub.y2OR.sub.y3, C(O)NR.sub.y1(R.sub.y2R.sub.y3), —C(O)NR.sub.y1(R.sub.y2OR.sub.y1), —OR.sub.y2R.sub.y3, and —OR.sub.y2OR.sub.y3, wherein each of R.sub.y1 and R.sub.y2 is independently selected from a group consisting of H, oxygen, alkyl, and aryl, and R.sub.y3 is aryl optionally substituted with at least one halogen; Z is —NR.sub.z1R.sub.z2, —NR.sub.z1R.sub.z3, —OR.sub.z1, —OR.sub.z1R.sub.z3, —C(O)R.sub.z1R.sub.z3, —C(O)OR.sub.z1R.sub.z3, —NR.sub.z1C(O)R.sub.z2R.sub.z3, —NR.sub.z1C(O)OR.sub.z2R.sub.z3, —C(O)NR.sub.z1R.sub.z3, or OR.sub.z2OR.sub.z3, wherein each of R.sub.z1 and R.sub.z2 is independently selected from a group consisting of H, oxygen, alkyl and aryl, and R.sub.z3 is aryl optionally substituted with at least one substituent independently selected from a group consisting of halogen, OH, —R.sub.zaCOOR.sub.zb, —OR.sub.zaCOOR.sub.zb, —R.sub.zaSO.sub.2R.sub.zb, —R.sub.zaSO.sub.2NR.sub.zbR.sub.zcR.sub.zd, —R.sub.zaC(O)R.sub.zbR.sub.zc, —R.sub.zaC(O)NR.sub.zbR.sub.zcR.sub.zd, —RZ.sub.aC(O)NR.sub.zbSO.sub.2R.sub.zc, wherein Rza is nil or alkyl, R.sub.zb is H or alkyl, each of R.sub.zb and R.sub.zc is independently selected from a group consisting of H, OH, alkyl, aryl, alkoxyl, or NR.sub.zbR.sub.zc is a nitrogen-containing heterocyclic alkyl ring, R.sub.zd is nil or a sulfonyl alkyl group. ##STR00001##

A photoinitiator is provided which incorporates a camphorquinone photoinitiator moiety.

A photoinitiator is provided which incorporates a camphorquinone photoinitiator moiety.

The present disclosure provides a benzene fused heterocyclic derivative of Formula (I): is a single or double bond; n is an integer of 0 or 1; A is CH.sub.2, CH(OH), or C(O); G is C or N; X is CH.sub.2, O, or C(O); Y is alkyl, aryl, or heterocyclic alkyl optionally substituted with at least one substituent independently selected from a group consisting of: H, halogen, alkyl, alkyl substituted with at least one halogen, aryl, aryl substituted with at least one halogen, NR.sub.y1R.sub.y2, OR.sub.y1, R.sub.y1C(O)R.sub.y3, C(O)R.sub.y1, C(O)OR.sub.y2, C(O)OR.sub.y2Ry3, NR.sub.y1C(O)R.sub.y2, NR.sub.y1C(O)NR.sub.y2R.sub.y3, NR.sub.y1C(O)OR.sub.y2R.sub.y3, NR.sub.y1C(O)R.sub.y2OR.sub.y3, C(O)NR.sub.y1(R.sub.y2R.sub.y3), C(O)NR.sub.y1(R.sub.y2OR.sub.y1), OR.sub.y2R.sub.y3, and OR.sub.y2OR.sub.y3, wherein each of R.sub.y1 and R.sub.y2 is independently selected from a group consisting of H, oxygen, alkyl, and aryl, and R.sub.y3 is aryl optionally substituted with at least one halogen; Z is NR.sub.z1R.sub.z2, NR.sub.z1R.sub.z3, OR.sub.z1, OR.sub.z1R.sub.z3, C(O)R.sub.z1R.sub.z3, C(O)OR.sub.z1R.sub.z3, NR.sub.z1C(O)R.sub.z2R.sub.z3, NR.sub.z1C(O)OR.sub.z2R.sub.z3, C(O)NR.sub.z1R.sub.z3, or OR.sub.z2OR.sub.z3, wherein each of R.sub.z1 and R.sub.z2 is independently selected from a group consisting of H, oxygen, alkyl and aryl, and R.sub.z3 is aryl optionally substituted with at least one substituent independently selected from a group consisting of halogen, OH, R.sub.zaCOOR.sub.zb, OR.sub.zaCOOR.sub.zb, R.sub.zaSO.sub.2R.sub.zb, R.sub.zaSO.sub.2NR.sub.zbR.sub.zcR.sub.zd, R.sub.zaC(O)R.sub.zbR.sub.zc, R.sub.zaC(O)NR.sub.zbR.sub.zcR.sub.zd, RZ.sub.aC(O)NR.sub.zbSO.sub.2R.sub.zc, wherein Rza is nil or alkyl, R.sub.zb is H or alkyl, each of R.sub.zb and R.sub.zc is independently selected from a group consisting of H, OH, alkyl, aryl, alkoxyl, or NR.sub.zbR.sub.zc is a nitrogen-containing heterocyclic alkyl ring, R.sub.zd is nil or a sulfonyl alkyl group.

##STR00001##

A photoinitiator is provided which incorporates a camphorquinone photoinitiator moiety.

Described is a method of synthesizing 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0] octan-3-one by reacting 3-(5-ethoxyhept-1-yl) cyclopentene with dichloroketene. The resulting reaction products are reacted with acetic acid and zinc to produce 4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-6-one and 4-(5-ethoxyhept-1-yl)bicyclo [3.2.0]heptan-7-one, which are reacted with trimethylsulfonium iodide to produce 2-(5-ethoxyhept-1-spiro[bicyclo[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane]. Lithium iodide is reacted with 2-(5-ethoxyhept-1-yl)spiro[bicyclo-[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane] to produce 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one. A method of synthesizing 6-(5-methoxyhept-1-yl)bicyclo[3.3.0]octan-3-one is also described.

Described is a method of synthesizing 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0] octan-3-one by reacting 3-(5-ethoxyhept-1-yl) cyclopentene with dichloroketene. The resulting reaction products are reacted with acetic acid and zinc to produce 4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-6-one and 4-(5-ethoxyhept-1-yl)bicyclo [3.2.0]heptan-7-one, which are reacted with trimethylsulfonium iodide to produce 2-(5-ethoxyhept-1-spiro[bicyclo[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane]. Lithium iodide is reacted with 2-(5-ethoxyhept-1-yl)spiro[bicyclo-[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane] to produce 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one. A method of synthesizing 6-(5-methoxyhept-1-yl)bicyclo[3.3.0]octan-3-one is also described.

Described is a method of synthesizing 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0] octan-3-one by reacting 3-(5-ethoxyhept-1-yl) cyclopentene with dichloroketene. The resulting reaction products are reacted with acetic acid and zinc to produce 4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-6-one and 4-(5-ethoxyhept-1-yl)bicyclo [3.2.0]heptan-7-one, which are reacted with trimethylsulfonium iodide to produce 2-(5-ethoxyhept-1-spiro[bicyclo[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane]. Lithium iodide is reacted with 2-(5-ethoxyhept-1-yl)spiro[bicyclo-[3.2.0]heptane-6,2-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2-oxirane] to produce 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one. A method of synthesizing 6-(5-methoxyhept-1-yl)bicyclo[3.3.0]octan-3-one is also described.