Synthesis and reactions of 1,5- and 1,3-dialkyl-(d-manno-pentitol-1-yl)-1H-1,2,4-triazole nucleosides derived from 1-(chloroalkyl)-1-aza-2-azoniaallene salts
作者:Najim A Al-Masoudi、Yaseen A. Al-Soud、Irene M. Lagoja
DOI:10.1016/s0008-6215(99)00084-1
日期:1999.5
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,