申请人:Nanyang Technological University
                            
                            
                                公开号:US20140309459A1
                            
                            
                                公开(公告)日:2014-10-16
                            
                            Present invention relates to a method of preparing a chiral α- or β-substituted ketone from the corresponding β- or γ-substituted aldehyde, wherein the ketone has formula (I), (III) or (V), and the corresponding aldehyde has formula (II), (IV) or (VI), respectively, the method comprising reacting the aldehyde of formula (II), (IV) or (VI) in the presence of an amine, oxygen and an organic solvent, wherein the reaction is carried out in the absence of a metal-based catalyst or a metal-based oxidant, wherein: R is H, a substituted or unsubstituted C
1
-C
10
alkyl, substituted or unsubstituted C
2
-C
15
alkenyl, substituted or unsubstituted C
2
-C
15
alkynyl, substituted or unsubstituted C
3
-C
15
cycloalkyl, substituted or unsubstituted C
3
-C
15
cycloalkenyl, substituted or unsubstituted C
3
-C
15
heterocycloalkyl, substituted or unsubstituted C
3
-C
15
heterocycloalkenyl, substituted or unsubstituted C
6
-C
15
aryl, or substituted or unsubstituted C
6
-C
15
heteroaryl; and R′ is H, a substituted or unsubstituted C
1
-C
10
alkyl, substituted or unsubstituted C
2
-C
15
alkenyl, substituted or unsubstituted C
2
-C
15
alkynyl, substituted or unsubstituted C
3
-C
15
cycloalkyl, substituted or unsubstituted C
3
-C
15
cycloalkenyl, substituted or unsubstituted C
3
-C
15
heterocycloalkyl, substituted or unsubstituted C
3
-C
15
heterocycloalkenyl, substituted or unsubstituted C
6
-C
15
aryl, or substituted or unsubstituted C
6
-C
15
heteroaryl.