Michael-type addition of enamino esters to 3,4,6-tri-O-benzyl-2-nitro-d-glucal under solvent-free conditions formed C-glycosides in excellent yields with high stereoselectivity. Reduction of the nitro group afforded the corresponding bicyclic 2-amino C-glycosides.
在无溶剂条件下,烯酰胺酯与 3,4,6-三-O-苄基-2-硝基-d-
葡萄糖醛进行迈克尔型加成,可生成具有高立体选择性的 C-糖苷,产量极佳。硝基还原后可得到相应的双环 2-
氨基 C-糖苷。