v-Triazolo[4,5-d]pyrimidines (8-azapurines). Part 18. Three new reactions for synthesizing 8-azapurinethiones from 4-amino-5-cyano-1,2,3-triazoles
作者:Adrien Albert、Clara J. Lin
DOI:10.1039/p19770000210
日期:——
4-Amino-5-cyano-1,2,3-triazole (2d) and its 1-, 2-, and 3-methyl and 3-benzyl derivatives were, variously, subjected to (a) condensation with triethyl orthoformate followed by treatment with sodium hydrogen sulphide, (b) condensation with O-ethyl dithiocarbonate, and (c) condensation with phenyl isothiocyanate, to give (respectively) 8-azapurine-6-thiones (4), 8-azapurine-2,6-dithiones (6), and 6-
将4-氨基-5-氰基-1,2,3-三唑(2d)及其1-,2-,3-甲基和3-苄基衍生物分别与(a)与原甲酸三乙酯缩合,然后用硫化氢钠处理,(b)与O-乙基二硫代碳酸酯缩合,和(c)与异硫氰酸苯基酯缩合,分别得到8-氮杂嘌呤-6-硫酮(4),8-氮杂嘌呤-2,6-二硫酮(6)和6-苯胺基-8-氮杂嘌呤-2-硫酮(9)。几种二硫酮的特征在于二-S-甲基化,得到2,6-双甲硫基-8-氮杂ap啶。研究了8-氮杂嘌呤-2,6-二硫酮(6d)可逆异构化为7-氨基[1,2,3]噻二唑并[5,4 - d ]嘧啶-5-硫酮(7)。红外线和讨论了1 H nmr光谱。