A convergent microwave assisted synthesis of 4-amino-N-(4-oxo-2-substituted-4H-quinazolin-3-yl)benzenesulfonamide derivatives
作者:Chandresh L. Jagani、Natvar A. Sojitra、Satish F. Vanparia、Tarosh S. Patel、Ritu B. Dixit、Bharat C. Dixit
DOI:10.3998/ark.5550190.0012.916
日期:——
An optimization of Grimmel’s method under microwave irradiation is reported here for the first time to synthesize 4-amino-N-(4-oxo-2-substituted-4H-quinazolin-3-yl)benzenesulfonamide derivatives. The method was successfully applied for the synthesis of 2-alkyl and 2-aryl substituted derivatives. However, unexpected results were obtained when the same protocol was applied for 2-styryl-substituted quinazolinones
本文首次报道了 Grimmel 方法在微波辐射下的优化合成 4-氨基-N-(4-氧代-2-取代-4H-喹唑啉-3-基)苯磺酰胺衍生物。该方法成功应用于2-烷基和2-芳基取代衍生物的合成。然而,当将相同的方案应用于 2-苯乙烯基取代的喹唑啉酮时,获得了意想不到的结果。然后在微波辐射下通过苯并恶嗪酮合成 2-苯乙烯基喹唑啉酮衍生物。随后,研究了各种碱(例如 Et3N、NMM、DMAP、DIPEA)对环化生成喹唑啉酮的效率的影响。与传统条件相比,微波辐射的使用可以显着提高速率和更好的产量。