Regioselective synthesis and biological evaluation of<i>N</i>-substituted 2-aminoquinazolin-4-ones
作者:Zhen-Yuan Liao、Wen-Hsiung Yeh、Pen-Yuan Liao、Yu-Ting Liu、Ying-Cheng Chen、Yi-Hung Chen、Tsung-Han Hsieh、Chia-Chi Lin、Ming-Hsuan Lu、Yi-Song Chen、Ming-Chih Hsu、Tsai-Kun Li、Tun-Cheng Chien
DOI:10.1039/c8ob00624e
日期:——
the Dimroth rearrangement in aqueous ethanolic sodium hydroxide gave exclusively the regioisomers, 2-(N-arylamino)quinazolin-4-ones. The regioselective synthesis of N-aryl-substituted 2-aminoquinazolin-4-ones can be further applied to the synthesis of benzimidazo[2,1-b]quinazolin-12-ones.
在对-TsOH存在下,在t- BuOH中,在回流下,邻氨基苯甲酸甲酯与N-芳基氰酰胺的反应主要得到3-芳基喹唑啉-4-酮。相比之下,相同的反应物与TMSCl在60°C的t- BuOH中反应,然后在乙醇氢氧化钠水溶液中进行Dimroth重排,仅得到区域异构体2-(N-芳基氨基)喹唑啉-4-酮。N-芳基取代的2-氨基喹唑啉-4-酮的区域选择性合成可以进一步应用于苯并咪唑并[2,1- b ]喹唑啉-12-酮的合成。