Synthetic studies toward the anthrax tetrasaccharide: alternative synthesis of this antigen
作者:Ophélie Milhomme、Sandrine G.Y. Dhénin、Florence Djedaïni-Pilard、Vincent Moreau、Cyrille Grandjean
DOI:10.1016/j.carres.2012.01.007
日期:2012.7
conjugation, has been envisaged by both [2+2] and [1+3] approaches from D-fucose and L-rhamnose. The successful route reported herein relies on a [1+3] strategy in which the 1,2-trans-glycosidic linkages have been secured using a participating group at the 2-position of the donors using conventional thio as well as trichloroacetimidate glycosylation chemistry. The exchange of the ester to benzyl protective
D-岩藻糖和L-鼠李糖的[2 + 2]和[1 + 3]方法都可以合成适于结合的炭疽四糖。本文报道的成功途径依赖于[1 + 3]策略,其中1,2-反式-糖苷键已通过使用常规硫代以及三氯乙酰亚氨酸酯糖基化化学方法在供体的2位使用参与基团得到固定。酯与鼠李糖基部分上的苄基保护基的交换是实现四糖最终组装和功能化的关键。