Regioselective synthesis and biological evaluation of N-substituted 2-aminoquinazolin-4-ones

Literature Information

Publication Date 2018-04-27
DOI 10.1039/C8OB00624E
Impact Factor 3.876
Authors

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


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Abstract

The reaction of methyl anthranilates with N-arylcyanamides in the presence of p-TsOH in t-BuOH under reflux afforded predominantly 3-arylquinazolin-4-ones. In contrast, the reaction of the same reactants with TMSCl in t-BuOH at 60 °C followed by 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.

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Organic & Biomolecular Chemistry
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