Efficient Synthesis of Isofagomine and Noeuromycin
摘要:
Starting from D-arabinose the synthesis of the very strong glycosidase inhibitors isofagomine (2) and noeuromycin (3) was achieved in six and seven steps, respectively. Keystep in the reaction sequence is the application of an efficient C-4 oxidation method to benzyl alpha -D-arabino-pyranoside. Subsequent Henry reaction of the obtained aldoketose with nitromethane provided the required branched carbohydrate precursors, which gave access to 2 and 3 in 17-21 % overall yield.
苄基 2,3,4-三-O-乙酰基-4-硝基甲基-beta-D-阿拉伯吡喃糖 在
乙酸酐 、 silica gel 作用下,
以88%的产率得到Benzyl 2,3-di-O-acetyl-4-deoxy-4-C-nitromethylene-β-D-arabino-pyranoside
参考文献:
名称:
Efficient Synthesis of Isofagomine and Noeuromycin
摘要:
Starting from D-arabinose the synthesis of the very strong glycosidase inhibitors isofagomine (2) and noeuromycin (3) was achieved in six and seven steps, respectively. Keystep in the reaction sequence is the application of an efficient C-4 oxidation method to benzyl alpha -D-arabino-pyranoside. Subsequent Henry reaction of the obtained aldoketose with nitromethane provided the required branched carbohydrate precursors, which gave access to 2 and 3 in 17-21 % overall yield.
Starting from D-arabinose the synthesis of the very strong glycosidase inhibitors isofagomine (2) and noeuromycin (3) was achieved in six and seven steps, respectively. Keystep in the reaction sequence is the application of an efficient C-4 oxidation method to benzyl alpha -D-arabino-pyranoside. Subsequent Henry reaction of the obtained aldoketose with nitromethane provided the required branched carbohydrate precursors, which gave access to 2 and 3 in 17-21 % overall yield.