Patent ID: 7326559

Claim:
A process for producing an optically active allene represented by formula (1): wherein R 2 and R 3 are different and each represents a hydrogen atom, an optionally substituted C 1-20 alkyl group or an optionally substituted C 6-20 aryl group, and R 4 represents an acyl group, which comprises reacting an allene derivative represented by formula (2): wherein R 1 represents a hydrogen atom and R 2 and R 3 have the same meaning as defined above, with an acylating agent having an acyl group represented by R 4 , in the presence of a lipase enzyme which is at least one member selected from the group consisting of Candida antarctica lipase, Pseudomonas fluorescens lipase, Pseudomonoas cepacia lipase, Porcine liver esterase and Candida rugosa lipase.