The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The invention relates to monocarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The invention relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.

The invention relates to novel small molecule compounds having a basic structure as depicted by formula (A), where in particular exemplary embodiments R.sup.1 is —OH, R.sup.2 is —NO.sub.2 and R.sup.3 is H, R.sup.4 and R.sup.5 are H, one of R.sup.6 and R.sup.7 is selected from H, —CONH.sub.2, and —CONR.sup.9.sub.2, and the other one is selected from —CONR.sup.9.sub.2 and —CONR.sup.11R.sup.9, wherein R.sup.9 and R.sup.11 are (possibly multiply) substituted alkyl and H or alkyl, respectively. The compounds of the invention inhibit the enzyme Catechol-O-methyltransferase (COMT) and exhibit a low off-target profile. The compounds are provided for use as a medicament, in particular for use in prevention or treatment of Parkinson's disease.

A method of selective conversion of Abienol, represented by formula 1, to Sclareodiol, represented by formula 2 ##STR00001##
by ozonolysis and subsequent reduction. The ozonolysis is carried out at temperatures above 60 C., preferably in nonhalogenated solvents. R is selected from H, acetals, aminals, optionally substituted alkyl groups, such as benzyl group, carboxylates such as acetates or formates, carbonates such as methyl or ethyl carbonates, carbamates, and any protecting group which can be attached to 1 and cleaved from 2, R is selected from CHCH.sub.2, an alkyl moiety with C2-C20, e.g. CH.sub.2CH.sub.3, or a cycloalkyl or polycycloalkyl moiety with C3-C20, e.g. cyclopropyl, optionally alkylated, respectively, and the wavy bond is depicting an unspecified configuration of the adjacent double bond between C2 and C3.

A method of selective conversion of Abienol, represented by formula 1, to Sclareodiol, represented by formula 2 ##STR00001##
by ozonolysis and subsequent reduction. The ozonolysis is carried out at temperatures above 60 C., preferably in nonhalogenated solvents. R is selected from H, acetals, aminals, optionally substituted alkyl groups, such as benzyl group, carboxylates such as acetates or formates, carbonates such as methyl or ethyl carbonates, carbamates, and any protecting group which can be attached to 1 and cleaved from 2, R is selected from CHCH.sub.2, an alkyl moiety with C2-C20, e.g. CH.sub.2CH.sub.3, or a cycloalkyl or polycycloalkyl moiety with C3-C20, e.g. cyclopropyl, optionally alkylated, respectively, and the wavy bond is depicting an unspecified configuration of the adjacent double bond between C2 and C3.

A method of selective conversion of Abienol, represented by formula 1, to Sclareodiol, represented by formula 2 ##STR00001##
by ozonolysis and subsequent reduction. The ozonolysis is carried out at temperatures above 60 C., preferably in nonhalogenated solvents. R is selected from H, acetals, aminals, optionally substituted alkyl groups, such as benzyl group, carboxylates such as acetates or formates, carbonates such as methyl or ethyl carbonates, carbamates, and any protecting group which can be attached to 1 and cleaved from 2, R is selected from CHCH.sub.2, an alkyl moiety with C2-C20, e.g. CH.sub.2CH.sub.3, or a cycloalkyl or polycycloalkyl moiety with C3-C20, e.g. cyclopropyl, optionally alkylated, respectively, and the wavy bond is depicting an unspecified configuration of the adjacent double bond between C2 and C3.