Aziridine ring cleavage reactions of five N-nosylepimines (2-6) having D-talo, D-galacto, D-manno, and D-allo configurations with potassium hydrogendifluoride under various reaction conditions have been performed. The cleavage regioselectively afforded diaxial isomers of vicinal amino-fluoro derivatives of 1,6-anhydro-β-D-gluco- and mannopyranose 7-11 in 51-94% yields. Removal of 2-nitrobenzenesulfonyl protecting group with benzenethiol has been attempted in the case of compound 10.
对五种具有D-
talo、D-
galacto、D-
manno和D-
allo构型的N-烷基
环丙胺(2-6)进行了
钾氢二
氟化物催化的
环丙胺环开裂反应,在不同的反应条件下进行了实验。该开裂反应选择性地生成了1,6-脱
水-β-D-葡萄和
甘露糖衍
生物的二轴异构体
氨基-
氟衍
生物(7-11),产率为51-94%。在化合物10的情况下尝试了用
苯硫醇去除2-
硝基苯磺酰保护基。