Diasteroselective Preparation of Cyclopropanols Using Methylene Bis(iodozinc)
摘要:
A diastereoselective synthesis of trans-2-substituted cyclopropanols is outlined. Bimetallic CH2(ZnI)(2) was found to react with alpha-chloroaldehydes to give cyclopropanols in yields of 64-89% and dr's >= 10:1. The high trans-selectivity resulted from equilibration of the cyclopropoxide intermediates.
Synthesis of Chiral<i>N</i>-Sulfonyl and<i>N</i>-Phosphinoyl α-Halo Aldimine Precursors
作者:Gretchen R. Stanton、Mehmet Göllü、Rebecca M. Platoff、Corinne E. Rich、Patrick J. Carroll、Patrick J. Walsh
DOI:10.1002/adsc.201200864
日期:2013.3.11
aldimines have emerged as an important class of synthetic intermediates. The stability and reactivity of α‐halo aldimines can vary greatly depending on the nitrogen protecting group. A general synthesis of stable, chiral α‐halo‐N‐sulfonyl and N‐phosphinoyl aldimine precursors is presented (42–96% yield). The corresponding α‐halo aldimines can be isolated upon treatment with a mild base. Enantioenriched α‐chloro
Diasteroselective Preparation of Cyclopropanols Using Methylene Bis(iodozinc)
作者:Kevin Cheng、Patrick J. Carroll、Patrick J. Walsh
DOI:10.1021/ol200597h
日期:2011.5.6
A diastereoselective synthesis of trans-2-substituted cyclopropanols is outlined. Bimetallic CH2(ZnI)(2) was found to react with alpha-chloroaldehydes to give cyclopropanols in yields of 64-89% and dr's >= 10:1. The high trans-selectivity resulted from equilibration of the cyclopropoxide intermediates.