Enantioselective synthesis of (S)- and (R)-α-methylserines: application to the synthesis of (S)- and (R)-N-Boc-N,O-isopropylidene-α-methylserinals
作者:Alberto Avenoza、Carlos Cativiela、Francisco Corzana、Jesús M. Peregrina、David Sucunza、Marı́a M. Zurbano
DOI:10.1016/s0957-4166(01)00159-8
日期:2001.4
This report describes the synthesis of enantiomerically pure (S)- and (R)-alpha -methylserines on a multigram scale, starting from the Weinreb amide of 2-methyl-2-propenoic acid and using a stereodivergent synthetic route that involves a Sharpless asymmetric dihydroxylation reaction. As a synthetic application of these quaternary alpha -amino acids, they were used as starting materials in the synthesis of the well-known valuable homochiral (S)- and (R)-N-Boc-N,O-isopropylidene-alpha -methylserinal building blocks. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of a new conformationally constrained glycoamino acid building block
作者:Alberto Avenoza、Jesús M. Peregrina、Emilio San Martı́n
DOI:10.1016/s0040-4039(03)01586-7
日期:2003.8
The synthesis of a suitably protected β-d-glucopyranosyl-(S)-α-methylserine derivative—a new conformationally constrained glycosylated quaternary amino acid analogue of β-d-glucopyranosyl-l-serine—is described. This compound can be used as an attractive buildingblock for the synthesis of new, constrained glycopeptides.