在与O-,C-,N-和S-亲核试剂的加成反应中,研究了衍生自d-葡糖醛的6- O -Trity1-(1a)和6-(O-苄基)-取代的环氧化物(1b)。通常根据亲核体与环氧乙烷氧配位的能力观察到1,4-区域和β-立体选择性或抗1,2-加成途径。当将TMSN 3或LiN 3用作基于叠氮化物的亲核试剂时,还会观察到1,2-syn加成途径。
作者:Holger Grugel、Fabian Albrecht、Tobias Minuth、Mike M. K. Boysen
DOI:10.1021/ol3015896
日期:2012.7.20
pseudo-enantiomeric olefinligands were designed from d-glucose and d-galactose. These ligands yield consistently excellent levels of enantioselectivity in Rh(I)-catalyzed 1,4-additions of aryl- and alkenylboronic acids to achiral enones and high diastereoselectivity with chiral substrates. Contrary to established olefinligands, they are obtained enantiomericallypure via short syntheses without racemic
Moufid, Nadira; Chapleur, Yves; Mayon, Patrick, Journal of the Chemical Society. Perkin transactions I, 1992, # 8, p. 999 - 1008
作者:Moufid, Nadira、Chapleur, Yves、Mayon, Patrick
DOI:——
日期:——
New Stereoselective β-Glycosylation via a Vinyl Oxirane Derived from <scp>d</scp>-Glucal
作者:Valeria Di Bussolo、Micaela Caselli、Mauro Pineschi、Paolo Crotti
DOI:10.1021/ol026648t
日期:2002.10.1
[reaction: see text] The reaction of the vinyl oxirane 1 derived from D-glucal with a series of O-nucleophiles (alcohols, phenol, and diacetone D-glucose) affords the corresponding 2-unsaturated beta-O-glycosides in a completely stereoselective way (syn 1,4-addition pathway). Epoxide 1 is generated in situ by treatment of the corresponding hydroxy mesylate 2 with t-BuOK in anhydrous benzene.