作者:M. José Alves、M. Alice Carvalho、Sílvia Carvalho、Alice M. Dias、Francisco H. Fernandes、M. Fernanda Proença
DOI:10.1002/ejoc.200700416
日期:2007.10
N,N-Dialkyladenine derivatives were prepared by two different reaction sequences starting from 5-amino-4-cyanoformimidoylimidazoles. When these imidazoles were treated with dimethylformamide diethyl acetal, a 5-aminomethyleneamino-4-cyanoformimidoylimidazole was isolated and evolved to the N,N-dialkyladenine in the presence of a secondary alkylamine. The same purine structure was isolated when the
N,N-二烷基腺嘌呤衍生物是通过两种不同的反应序列从 5-amino-4-cyanoformimidoylimidazoles 开始制备的。当这些咪唑用二甲基甲酰胺二乙基乙缩醛处理时,5-氨基亚甲基氨基-4-氰基甲酰亚胺基咪唑被分离出来并在仲烷基胺的存在下演变为N,N-二烷基腺嘌呤。当首先用仲胺处理 5-氨基-4-氰基甲酰亚胺基咪唑以得到稳定的 4-脒基-5-氨基咪唑时,分离出相同的嘌呤结构。在室温下,当 4-脒基-5-氨基咪唑与二甲基甲酰胺二乙缩醛混合时,生成所需产物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)