Synthesis of 2-aryl-2,3-dihydro-4-styrylpyrimidodiazepines in the reaction of 4,5,6-triaminopyrimidine and 2,4,5,6-tetraaminopyrimidine with diarylidenacetones
作者:Braulio Insuasty、Henry Insuasty、Jairo Quiroga、Manuel Nogueras、Adolfo Sánchez、M. Dolores López
DOI:10.1002/jhet.5570360418
日期:1999.7
obtained in the reaction of 2,4,5,6-tetraaminopyrimidine 1a and 4,5,6-triaminopyrimidine 1b with one equivalent of the diaryli dene acetones 2 in absolute ethanol with acetic acid as the catalyst. Structure analysis of 6-amino and 6,8-diamino-2-aryl-2,3-dihydro-4-styryl-1H-pyrimido[4,5-b][1,4]diazepines 3a-i, determined by detailed nmr measurements, reveals a high regioselectivity of this reaction.
在2的反应中,获得了新的6-氨基和6,8-二氨基-2-芳基-2,3-二氢-4-苯乙烯基-1 H-嘧啶基[4,5- b ] [1,4]二氮杂s。 4,5,6-四氨基嘧啶1a和4,5,6-三氨基嘧啶1b,在无水乙醇中一当量的二芳基癸二酮丙酮2,以乙酸为催化剂。6-氨基和6,8-二氨基-2-芳基-2,3-二氢-4-苯乙烯基-1 H-嘧啶基[4,5- b ] [1,4]二氮杂卓3a-i的结构分析,通过详细的核磁共振测量表明,该反应具有很高的区域选择性。