1,3-dimethyl 2-oxo 1,3,2-diazaphospholidine precursor of (Z) α,β-unsaturated esters.
作者:Carl Patois、Philippe Savignac
DOI:10.1016/s0040-4039(00)79655-9
日期:1991.3
alpha,beta-Unsaturated esters of (Z) geometry are selectively obtained from cyclic phosphonocarboxylates derived from N,N'-dimethylethylenediamine.
Anionic versus photochemical diastereoselective deconjugation of diacetone d-glucose α,β-unsaturated esters
作者:Frédéric Bargiggia、Olivier Piva
DOI:10.1016/s0957-4166(03)00365-3
日期:2003.7
Deconjugation of diacetone D-glucose alpha, beta-unsaturated esters has been conducted by deprotonation using NaHMDS with HMPA as co-solvent followed by stereoselective protonation at low temperature. High selectivities (>95%) were obtained with oc-methyl linear compounds. (C) 2003 Elsevier Science Ltd. All rights reserved.