v-Triazolo[4,5-d]pyrimidines (8-azapurines). Part 24. The 3-alkyl derivatives
作者:Adrien Albert
DOI:10.1039/p19810002344
日期:——
4-Methylamino-1,2,3-triazole-5-carboxamide (2e) and its 3-benzyl derivative (2b) were cyclized with hydrochloric acid and triethyl orthoformate to give 3-methyl-8-azapurin-6(1H)-one (1c) and its 9-benzyl derivative (1b). The reaction mechanism is discussed. The 8-azapurinone (1c) was converted by phosphorus pentasulphide into 3-methyl-8-azapurine-6(1H)-thione (9) and an extraordinary by-product, 5-amino-1
将4-甲基氨基-1,2,3-三唑-5-羧酰胺(2e)及其3-苄基衍生物(2b)用盐酸和原甲酸三乙酯环化,得到3-甲基-8-氮杂嘌呤-6(1 H) -1(1c)及其9-苄基衍生物(1b)。讨论了反应机理。通过五硫化二磷将8-氮杂嘌呤酮(1c)转化为3-甲基-8-氮杂嘌呤-6(1 H)-硫酮(9)和非凡的副产物5-氨基-1,2,3-噻二唑- 4- N-(硫代甲酰基)碳硫代酰胺(10)。两个8-氮杂嘌呤酮(1c)和(1b)的氢化分别得到1,2-二氢-3-甲基-8-氮杂嘌呤-6(3 H)-一(7b)及其9-苄基衍生物(7a)。 。