Alcohol Dehydrogenase‐Triggered Oxa‐Michael Reaction for the Asymmetric Synthesis of Disubstituted Tetrahydropyrans and Tetrahydrofurans
作者:Harry Eastman、James Ryan、Beatriz Maciá、Vittorio Caprio、Elaine O'Reilly
DOI:10.1002/cctc.201900658
日期:2019.8.21
oxanes) and tetrahydrofurans, in excellent conversion, yield and high enantiomeric and diastereomeric excess. To highlight the utility of the methodology, we report the synthesis of an analogue of the fungal antioxidant brocaketone A. Also described is the preparation of the (–)‐(R,R)‐enantiomer of the natural product, (+)‐(S,S)‐(cis‐6‐methyltetrahydropyran‐2‐yl)acetic acid.
醇脱氢酶介导的不对称还原反应和随后的分子内oxa-Michael反应已经开发出来,用于制备四氢吡喃(或恶烷)和四氢呋喃,具有优异的转化率,收率和高对映异构体和非对映异构体过量。为了强调该方法的实用性,我们报告了真菌抗氧化剂溴酸甲壳素A的类似物的合成。还描述了天然产物(-)-(R,R)-对映异构体(+)-(S,S)-(顺式-6-甲基四氢吡喃-2-基)乙酸。