Abstract 1-(Chloroalkyl)1-aza-2-azoniaallene salts underwent cycloaddition with penta- O -benzoyl- d -mannonic acid nitrile to give several intermediates. The salts of these rearranged spontaneously to the protonated 1,2,4-triazoles, which hydrolysed, in situ, to the acyclic 1,2,4-triazole C-nucleosides. Deblocking of the latter afforded the free nucleosides. Analogous treatment of 1,1- tert -butylmethyl
摘要将1-(
氯烷基)1-氮杂-2-氮杂苯
丙烯盐与五-O-苯甲酰基-d-甘露酸腈进行环加成反应,制得几种中间体。它们的盐自发地重排成质子化的
1,2,4-三唑,其原位
水解成无环的
1,2,4-三唑C-核苷。后者的解封闭得到游离核苷。在重排和
水解后,用五-O-苯甲酰基-d-
甘露糖酸腈类似处理1-氮杂-2-氮杂
壬烯丙烯盐的1,1-叔丁基甲基衍
生物,得到无环C-核苷,解环后得到游离核苷。1-乙基-3-(d-
甘露糖醇-1-基)-5-甲基-1 H -
1,2,4-三唑和5-(d-
甘露糖醇-1-基)-3的乙酰化-甲基-1-(1,2,4-
三氯苯基)-1 H -1,2,