Doubly diastereoselective conjugate addition of homochiral lithium amides to homochiral α,β-unsaturated esters containing cis- and trans-dioxolane units
作者:Stephen G. Davies、Matthew J. Durbin、Euan C. Goddard、Peter M. Kelly、Wataru Kurosawa、James A. Lee、Rebecca L. Nicholson、Paul D. Price、Paul M. Roberts、Angela J. Russell、Philip M. Scott、Andrew D. Smith
DOI:10.1039/b818298a
日期:——
corresponding β-amino ester (containing three contiguous stereocentres) is produced. Upon conjugate addition to a homochiral α,β-unsaturated ester containing a cis-dioxolane unit, in the “mismatched” case it is the stereocontrol of the substrate which is dominant over that of the lithium amide, whilst upon addition to homochiral α,β-unsaturated esters containing a trans-dioxolane unit the stereocontrol of