Synthetic Elaboration of the Side Chain of (<i>R</i>)-2,2-Dimethyl-3-(<i>tert</i>-butoxycarbonyl)-4-ethynyloxazolidine: A New Regio- and Stereoselective Strategy to δ-Functionalized β-Amino Alcohols
作者:Gianna Reginato、Alessandro Mordini、Massimo Caracciolo
DOI:10.1021/jo970619s
日期:1997.9.1
An investigation of the reactivity of ethynyloxazolidine 2 is presented. Functionalization at the acetylenic position has been found to occur very easily using the mild Sonogashira conditions. Addition of tributyltin cuprate 1 provided the corresponding stannylated (E)-ethenyloxazolidine 3, a new chiral building block which has been reacted with electrophiles under Pd catalysis. The reaction sequence occurred without racemization and showed an easy and mild procedure for the regio- and stereoselective synthesis of unsaturated amino alcohols.