The reactions of silyl nitronates with organolithium reagents
作者:Ernest W. Colvin、Alan D. Robertson、Dieter Seebach、Albert K. Beck
DOI:10.1039/c39810000952
日期:——
Silyl nitronates derived from primary and secondary nitroalkanes react with organolithium reagents to yield chain-extended oximes in modest to good yield.
Enantioselective MSPV Reduction of Ketimines Using 2-Propanol and (BINOL)Al<sup>III</sup>
作者:Christopher R. Graves、Karl A. Scheidt、SonBinh T. Nguyen
DOI:10.1021/ol060110w
日期:2006.3.1
A highly enantioselective Meerwein-Schmidt-Ponndorf-Verley (MSPV) reduction of N-phosphinoyl ketimines by (BINOL)Al-III/2-propanol is reported. Yields ranging between 79 and 85% with high enantiomeric excesses (93-98%) are observed for a wide range of structurally diverse ketimines. A [2.0.4] bicyclic chelation model is proposed to account for this high selectivity.