Synthesis of 2-Arylquinazolin-4(3<i>H</i>)-ones by<i>N</i>-Aryl Benzamidines with Aromatic Carbonates
作者:Shunichi Aikawa、Chiharu Sekiguchi、Yuko Yamazaki、Mika Hattori、Tatsuya Isaka、Yasuhiko Yoshida、Shogo Ihara
DOI:10.1002/jhet.1638
日期:2014.3
The reaction of N‐aryl benzamidines 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 1l, 1m, 1n with diphenyl carbonate 2a or ethyl phenyl carbonate 2b synthesized 2‐arylquinazolin‐4(3H)‐ones 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n in simple and safe process with good yields (71–90%). It was suggested that different electron‐donating substituent in N‐aryl benzamidines 1a, 1b, 1c, 1d, 1e, 1f
的反应ñ -芳基苯甲脒1A,1B,1C,1D,1E,1F,1克,1H,1I,1J,1K,1升,1米,1N与碳酸二苯酯2A或乙基苯基酯2b中合成的2- arylquinazolin-4( 3 H)-one 3a,3b,3c,3d,3e,3f,3g,3h,3i,3j,3k,3l,3m,3n以简单而安全的方法生产,收率良好(71–90%)。建议在N-芳基苄am 1a,1b,1c,1d,1e,1f,1g,1h,1i,1j,1k,1l,1m,1n中使用不同的供电子取代基与2-芳基喹唑啉-4(3 H)-酮3a,3b,3c,3d,3e,3f,3g,3h,3i,3j,3k,3l,3m,3n的收率相似。在这些反应中,N-芳基苄be 1a,1b,1c,1d,1e,1f,1g,1h,1i,1j,1k,1l,1m,1n通过与碳酸盐2亲核加成而形成中间体化合物,从而得到环化产物3a,3b,3c,3d,3e,3f,3