Synthesis of C-glycosyl β-amino acids by asymmetric Mannich-type three-component reactions
作者:Alessandro Dondoni、Alessandro Massi、Simona Sabbatini、Valerio Bertolasi
DOI:10.1016/j.tetlet.2004.01.070
日期:2004.3
C-Galactosyl and C-ribosyl β-amino acids were prepared by one-pot InCl3-catalyzed Mannich-type three-component condensation (3CC) by combining the corresponding formyl C-glycoside, p-methoxybenzyl amine, and a ketene silyl acetal. In each case the reaction was highly stereoselective and afforded only one single product in good to excellent yields.
Ç半乳糖和Ç -ribosylβ氨基通过单罐中制备羧酸的InCl 3通过组合催化的曼尼希型三成分缩合(3CC)中相应的甲酰基C-糖苷,p甲氧基苄基胺和甲硅烷基乙烯酮乙缩醛。在每种情况下,反应是高度立体选择性的,并且仅以良好至优异的产率提供了一种产物。