A flexible and modular stereoselective synthesis of (9R,10S)-dihydrosterculic acid
作者:John W. Palko、Peter H. Buist、Jeffrey M. Manthorpe
DOI:10.1016/j.tetasy.2013.01.003
日期:2013.2
(9R,10S)-Dihydrosterculic acid has been prepared from (S-s,S-s)-1,1-bis(p-tolylsulfinyl)methane in a sequence involving an asymmetric Corey-Chaykovsky cyclopropanation and two sulfoxide/lithium exchange reactions. In most steps, the reaction conditions had to be optimized for the unbranched alkyl substituents, which were prone to Evans-Mislow rearrangements and subsequent degradation. (C) 2013 Elsevier Ltd. All rights reserved.
从(S-s,S-s)-1,1-双(对甲苯基亚砜基)甲烷出发,依次通过不对称Corey-Chaykovsky环丙烷化反应和两次硫氧化锂交换反应,成功制备了(9R,10S)-二氢树胶酸。在大多数步骤中,必须针对无支链的烷基取代基优化反应条件,因为这些取代基容易发生Evans-Mislow重排,并随后降解。©2013 Elsevier Ltd. 保留所有权利。