Synthesis of Vicinal anti-Amino Alcohols from N- tert-Butanesulfinyl Aldimines and Cyclopropanols

J Org Chem. 2024 May 3;89(9):6193-6204. doi: 10.1021/acs.joc.4c00198. Epub 2024 Apr 13.

Abstract

The stereoselective synthesis of vicinal amino alcohols derivatives from 1-substituted cyclopropanols and chiral N-tert-butanesulfinyl imines is described. Cyclopropanols are easily prepared from carboxylic esters upon reaction with ethylmagnesium bromide in the presence of titanium tetraisopropoxide and undergo carbon-carbon bond cleavage by means of diethylzinc to produce, upon base deprotonation, enolized zinc homoenolates, which react with chiral sulfinyl imines in a highly regio- and stereoselective manner.