Chiral oxazolines having the general formula:
wherein R is C₁ to C₁₀ alkyl or phenyl and the R¹ groups are independently hydrogen or C₁ to C₄ alkyl are prepared in substatially optically pure form by a process comprising the steps of (1) reacting a nitrile oxide of formula R-C=N-O with an acryloyl derivative of formula Z-COCH=C(R¹)₂ where Z is a moiety derived from a chiral sultam and
(2) reacting the product of step (1) with a hydrogenating agent to produce the oxazoline and a chiral sultam of formula ZH.
The chiral oxalines described are useful as intermediates in e.g. the pharmaceutical or agrochemical industries.
具有通式的手性
噁唑啉: 其中 R 为 C₁ 至 C₁₀ 烷基或苯基,R¹ 基团独立地为氢或 C₁ 至 C₄ 烷基,通过以下步骤制备亚光学纯形式的手性
噁唑啉。 O 与式 Z-COCH=C(R¹)₂ 的
丙烯酰衍
生物反应,其中 Z 是衍生自手性苏坦的分子;(2) 将步骤 (1) 的产物与氢化剂反应,生成草唑啉和式 ZH 的手性苏坦。 所述手性
噁唑啉可用作医药或农用
化学品等行业的中间体。