Rapid syntheses of difluorinated polyols using a cleavable carbamate
Abstract
Trifluoroethyl N-[2-(tert-butyldiphenylsilyloxy)ethyl]-N-isopropylcarbamate undergoes smooth dehydrofluorination–metallation followed by BF3·OEt2 mediated addition to aldehydes to afford a range of allylic alcohols; aldol reaction with a second aldehyde, then reduction, affords products which can be deprotected to afford difluorinated polyols.