Patent ID: 7795464

Claim:
A method for producing a compound represented by the following formula (4), wherein a compound represented by the following formula (3) is reacted with hydrogen cyanide under the presence of an asymmetric catalyst: [In the formula, R 1 represents C 1-4 alkyl group, allyl group, C 1-4 alkyloxy C 1-4 alkyl group, C 1-4 alkyloxy C 1-4 alkyloxy C 1-4 alkyl group, aryl group, substituted aryl group, arylmethyl group, substituted arylmethyl group, tri C 1-4 alkylsilyl group or diphenylmethylsilyl group; R 2 represents allyl group, aryl group, substituted aryl group, arylmethyl group or substituted arylmethyl group]; [In the formula, R 1 and R 2 represent the same meaning as aforementioned].