Using 3-O-methyl-D-chiro-inosito as starting material,through acetalation and mesylation the intermediate 3,which was subjected to hydrolysis to afford 3-O-Methyl-4-[(methylsulfonyl)oxy]-D-chiro-inositol 4 was obtaine...Using 3-O-methyl-D-chiro-inosito as starting material,through acetalation and mesylation the intermediate 3,which was subjected to hydrolysis to afford 3-O-Methyl-4-[(methylsulfonyl)oxy]-D-chiro-inositol 4 was obtained.Subsequently,the key epoxide 5 was obtained in excellent yield via an epoxidation from the compound 4.Finally,the process of opening of epoxy ring by azole-bases resulted in the novel carbocyclic azole nucleoside compounds 6-10 in the presence of 1,8-diazabicycloundec-7-ene(DBU) as catalyst,which appeared strong regioselectivity.展开更多
文摘Using 3-O-methyl-D-chiro-inosito as starting material,through acetalation and mesylation the intermediate 3,which was subjected to hydrolysis to afford 3-O-Methyl-4-[(methylsulfonyl)oxy]-D-chiro-inositol 4 was obtained.Subsequently,the key epoxide 5 was obtained in excellent yield via an epoxidation from the compound 4.Finally,the process of opening of epoxy ring by azole-bases resulted in the novel carbocyclic azole nucleoside compounds 6-10 in the presence of 1,8-diazabicycloundec-7-ene(DBU) as catalyst,which appeared strong regioselectivity.