Microwave-assisted synthesis of new regioisomeric 6,7-dihydroindeno[1,2-<i>e</i>]pyrimido[4,5-<i>b</i>][1,4]diazepin-5(5a<i>H</i>)-ones
作者:Braulio Insuasty、Fabián Orozco、Angélica Garcia、Jairo Quiroga、Rodrigo Abonia、M. Nogueras、Justo Cobo
DOI:10.1002/jhet.5570450616
日期:2008.11
11-amino-6-aryl-6,7-dihydroindeno[1,2-e] pyrimido[4,5-b][1,4]diazepin-5(5aH)-ones 4a-f were prepared regioselectively by the tricomponent reaction of 4,5,6-triaminopyrimidine 1, 1,3-indandione 2 and aromatic aldehydes 3a-f. The bicomponent approach, using 2,4,5,6-tetraaminopyrimidine 5 and 2-aryl-ideneindandiones 6a-f as reagents, afforded 9,11-diamino-6-aryl-6,7-dihydroindeno[1,2-e]pyrimido[4,5-b]-[1,4]diazepin-5(5aH)-ones
通过区域选择性地制备新的11-氨基-6-芳基-6,7-二氢茚并[1,2- e ]嘧啶基[4,5- b ] [1,4]二氮杂-5-5(5a H)-ones 4a-f。 4,5,6-三氨基嘧啶1、1,3-茚满二酮2与芳香醛3a-f的三组分反应。使用2,4,5,6-四氨基嘧啶5和2-芳基亚茚并二酮6a-f作为试剂的双组分方法,可得到9,11-二氨基-6-芳基-6,7-二氢茚并[1,2- e ]嘧啶[4,5- b ]-[1,4]二氮杂-5(5a H)-酮7a-f的产率高,区域异构体8,10-二氨基衍生物8a-c的产率低。双组分和三组分方法均通过微波辐射进行,所有产品均通过详细的NMR测量充分表征。