| 摘要 |
<p>An optically active 2-azetidinone derivative which has a novel structure represented by the formula (II) is produced with ease, at a low cost and on a large scale, by a method comprising allowing an enzyme having the capability of the asymmetric decomposition of an ester to act on a compound represented by the formula (I), wherein R?1, R2, and R3¿ are specific substituents, respectively, enzyme (I) --------- (II).</p> |
