Rhodium(I)-Catalyzed Enantioselective Ring-Opening and Isomerization of Cyclobutanols through a (<i>Z</i>)-Unsaturated Ketone Intermediate
作者:Jianzhong Lu、Mengzhen Zhang、Xinxin Zheng、Pei Shen、Yuemeng Xu、Qian Zhang、Yixin Tang、Guozhu Zhang、Rui Guo
DOI:10.1021/acs.orglett.3c01870
日期:2023.7.14
A rhodium(I)-catalyzed highly enantioselective ring-opening and isomerization of cyclobutanols has been developed. The reaction provides a mild, atom-economical, and redox-neutral approach for the synthesis of chiral acyclic ketones bearing a β-tertiary stereocenter. Excellent enantioselectivities and high yields can be achieved using cyclobutanols with alkoxy substituents at the C3 position. Mechanistic
开发了铑(I)催化的环丁醇的高对映选择性开环和异构化反应。该反应为合成带有β-叔立构中心的手性无环酮提供了一种温和、原子经济且氧化还原中性的方法。使用 C3 位带有烷氧基取代基的环丁醇可以获得优异的对映选择性和高产率。机理研究表明,环丁醇仅发生分子内氢迁移,( Z )-不饱和酮中间体的形成对于实现高对映选择性至关重要。