Copper-catalyzed sequential arylation and intramolecular annulation of 2-(2-bromophenyl)-2,3-dihydroquinazolin-4(1H)-ones with amidines
作者:Fujun Duan、Miaochang Liu、Jiuxi Chen、Jinchang Ding、Yuefei Hu、Huayue Wu
DOI:10.1039/c3ra41969j
日期:——
sequential arylation and intramolecular annulation of 2-(2-bromophenyl)-2,3-dihydroquinazolin-4(1H)-ones with alkyl amidines has been developed for the synthesis of 6-alkyl 11bH-quinazolino[3,4-a]quinazolin-13(12H)-ones (3) in moderate to good yields. However, the arylated products N-(2-(4-oxo-1,2,3,4-tetrahydroquinazolin-2-yl)phenyl)benzimidamides (4) are isolated when aryl amidines are used in the transformation
铜催化的连续芳基化和2-(2-溴苯基)-2,3-二氢喹唑啉-4(1 H)-与烷基am的分子内环化反应已被开发出来,用于合成6-烷基11 bH - quinazolino [3]。 ,4 - a ]喹唑啉-13(12 H)-ones(3),产率中等至良好。然而,当在转化中使用芳基am时,分离出芳基化的产物N-(2-(4-氧代-1,2,3,4-四氢喹唑啉-2-基)苯基)苯并氨基酰胺(4)。