the chemoselective cleavage of benzylideneacetals having sensitive functional groups under mild conditions. It is easy to perform on large scale owing to minimal catalyst loading (0.5 mol-%). Several sensitive functional groups such as TBDPS ether, -OMs, -OAc, allyl ether, N-Boc, N-Fmoc and N-Cbz are stable under the reaction conditions. In addition, benzylideneacetal is selectively cleaved in the
A regioselective reductive cleavage of benzylidene acetal: stereoselective synthesis of N-Boc-protected cis-(2R,3S)-3-hydroxy pipecolic acid
作者:Ponminor Senthil Kumar、Sundarababu Baskaran
DOI:10.1016/j.tetlet.2009.03.007
日期:2009.7
A stereoselective synthesis of N-Boc-protected cis-(2R,3S)-3-hydroxy pipecolic acid, starting from d-glucose is described. The key step in the overall synthesis is a highly regioselectivereductivecleavage of benzylidene acetal 13 leading to hydroxymethyl piperidine derivative 14.