v-Triazolo[4,5-d]pyrimidines (8-azapurines). Part 22. Synthesis of 2-amino- and 2-oxo-derivatives of N-alkyl-1,6-dihydro-8-azapurines from the corresponding 4-amino-5-aminomethyl-1,2,3-triazoles
作者:Adrien Albert
DOI:10.1039/p19800002918
日期:——
similarly alkylated, were obtained by ring-closure of N-alkyl-4-amino-5-ethoxycarbonyl-aminomethyl-1,2,3-triazoles, e.g.(2e). Dehydrogenation of six dihydro-compounds with potassium permanganate gave 8-azapurines. These had strong covalent hydrating tendencies to form secondary alcohols of the type (5). Two of the 2-amino-compounds (4a and b) exhibited this property in the cations, and all the oxo-compounds
由相应的N-烷基-4-氨基-5-氨基甲基-1,2,3-三唑合成在环氮原子上烷基化的2-氨基-1,6-二氢-8-氮杂嘌呤(1c–e),例如(2a)中,和溴化氰。1,6-二氢-8- azapurin -2-酮(3),类似地烷基化中,通过闭环得到ñ -烷基-4-氨基-5-乙氧羰基氨基甲基-1,2,3-三唑,例如(2e)。用高锰酸钾将六种二氢化合物脱氢,得到8-氮杂ap啶。这些具有强的共价水合趋势,以形成类型(5)的仲醇。2-氨基化合物中的两种(4a和b)在阳离子中表现出此特性,而所有含氧化合物(6)在中性物种中表现出这一特性。物理性质(1测量并讨论了H nmr,uv,ir)或典型产品。