Solvent-Free and Stereoselective Synthesis of C-Glycosides by Michael-Type Addition of Enamino Esters to 2-Nitro-d-glucal
作者:Chu-Yi Yu、Zhi-Tang Huang、Ti Zhang、Yue-Mei Jia
DOI:10.1055/s-0030-1258498
日期:2010.9
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。