作者:Xiong Wei、Danlin Liang、Qing Wang、Xiangbao Meng、Zhongjun Li
DOI:10.1039/c6ob01622g
日期:——
Total synthesis of mangiferin, homomangiferin, and neomangiferin, three C-glycosyl xanthone natural products with a wide spectrum of pharmacological effects, has been achieved starting from 2,3,4,6-tetra-O-benzyl-α/β-D-glucopyranose. The key steps involve a stereoselective Lewis acid promoted C-glycosylation of protected phloroglucinol with tetrabenzylglucopyranosyl acetate and a highly regioselective
从2,3,4,6-四-O-苄基-α/β- D-起始已实现了芒果苷,高芒果苷和新芒果苷的全合成,这是三种具有广泛药理作用的C-糖基yl吨酮天然产物。吡喃葡萄糖。关键步骤包括用四苄基吡喃葡萄糖基乙酸酯立体选择性的路易斯酸促进受保护的间苯三酚的C-糖基化和高度区域选择性的碱基诱导的环化,以构建核心黄酮骨架。