Asymmetric Synthesis of α,α-Dibranched Propargylamines by Acetylide Additions to N-tert-Butanesulfinyl Ketimines
摘要:
Addition of lithium acetylides prepared from 1-pentyne, phenylacetylene, and trimethylsilylacetylene to diverse N-tert-butanesulfinyl ketimines affords a range of alpha, alpha-dibranched propargyl sulfinamides in generally good yields (up to 87%) and with high diastereoselectivities (up to > 99: 1). Acidic cleavage of the tert-butanesulfinyl group provides the free alpha, alpha-dibranched propargylamines.
Asymmetric Synthesis of α,α-Dibranched Propargylamines by Acetylide Additions to N-tert-Butanesulfinyl Ketimines
摘要:
Addition of lithium acetylides prepared from 1-pentyne, phenylacetylene, and trimethylsilylacetylene to diverse N-tert-butanesulfinyl ketimines affords a range of alpha, alpha-dibranched propargyl sulfinamides in generally good yields (up to 87%) and with high diastereoselectivities (up to > 99: 1). Acidic cleavage of the tert-butanesulfinyl group provides the free alpha, alpha-dibranched propargylamines.
Asymmetric Synthesis of α,α-Dibranched Propargylamines by Acetylide Additions to <i>N</i>-<i>tert</i>-Butanesulfinyl Ketimines
作者:Andrew W. Patterson、Jonathan A. Ellman
DOI:10.1021/jo061160h
日期:2006.9.1
Addition of lithium acetylides prepared from 1-pentyne, phenylacetylene, and trimethylsilylacetylene to diverse N-tert-butanesulfinyl ketimines affords a range of alpha, alpha-dibranched propargyl sulfinamides in generally good yields (up to 87%) and with high diastereoselectivities (up to > 99: 1). Acidic cleavage of the tert-butanesulfinyl group provides the free alpha, alpha-dibranched propargylamines.