Asymmetric Synthesis of Di- and Trisubstituted Cyclopropanes through an Intramolecular Ring Closure
作者:Jeffrey Kallemeyn、Mathew Mulhern、Yi-Yin Ku
DOI:10.1055/s-0030-1259535
日期:2011.3
An asymmetric synthesis of di- and trisubstituted cyclopropanes proceeding through an intramolecular ring closure of activated chiral benzyl alcohols has been developed. The chiral alcohol intermediates are obtained from asymmetric reduction of readily available 1,4-keto esters and undergo a one-pot activation and ring closure to provide the ester-functionalized cyclopropanes in high enantio- and diastereomeric
已经开发了通过活化手性苯甲醇的分子内闭环进行的二取代和三取代环丙烷的不对称合成。手性醇中间体通过容易获得的 1,4-酮酯的不对称还原获得,并经过一锅活化和闭环以提供高对映体和非对映体纯度的酯官能化环丙烷。这种方法避免使用环丙烷化反应中常用的危险重氮和烷基锌试剂。