nta-1,4-diyn-3-ol (5), an essential segment of various bioactive polyacetylenic alcohols, has been efficiently resolved via a lipase-catalyzed acylation strategy. Lipases from different Pseudomonas species and Candida rugosa (CRL) furnished its (S)-antipode (as esters) with 86-96% ee. However, the (R)-alcohol 5 could be prepared with acceptable enantiomeric purity (93% ee) only using CRL-vinyl acetate-diisopropyl
标题chiron,1-叔丁基二甲基甲
硅烷基戊-1,4-diyn-3-ol(5),是各种
生物活性聚
乙炔醇的重要组成部分,已通过
脂肪酶催化的酰化策略得到了有效解决。来自不同假单胞菌种和皱纹假丝酵母(CRL)的
脂肪酶为其(S)-正肽(作为酯)提供了86-96%ee。但是,仅使用CRL-
乙酸乙烯酯-二
异丙醚作为试剂方案并在双重过滤条件下,才能以可接受的对映体纯度(93%ee)制备(R)-醇5。然后通过其
吡喃基化,所需的非手性C(20)-α,ω-二
溴化物15的烷基化作用和适当的官能化,将Chiron醇扩展至目标化合物(15E,R,R)-Duryne(I)。