A Novel Approach for C–C, C–N, and C–O Bond Formation Reactions: A Facile Synthesis of Benzophenazine, Quinoxaline, and Phenoxazine Derivatives via Ring Opening of Benzoxepines
作者:Bhimapaka China Raju、Kasagani Veera Prasad、Gannerla Saidachary、Balasubramanian Sridhar
DOI:10.1021/ol4033122
日期:2014.1.17
synthesis of benzophenazine, quinoxaline, and phenoxazine derivatives by the reaction of benzoxepine-4-carboxylates with benzene-1,2-diamines, ethane-1,2-diamine, and 2-aminophenols in the presence of Bi(OTf)3 (5 mol %) under mild conditions in very good yields. The present protocol opens a new way for C–C, C–N, and C–O bond-formation reactions in a single-step process. The structural assignment was
已开发出一种新的一锅操作规程,用于通过苯并氧杂庚酸酯-4-羧酸盐与苯-1,2-二胺,乙烷-1,2-二胺和2-氨基苯酚的反应来合成苯并吩嗪,喹喔啉和苯恶嗪衍生物在温和的条件下在Bi(OTf)3(5 mol%)存在下以非常好的收率。本协议为单步过程中C–C,C–N和C–O键形成反应开辟了一条新途径。通过X射线分析确认了结构分配。