Synthesis 2013; 45(21): 2998-3006
DOI: 10.1055/s-0033-1338521
paper
© Georg Thieme Verlag Stuttgart · New York

One-Pot Synthesis of Quinazolinones from Anthranilamides and Aldehydes via p-Toluenesulfonic Acid Catalyzed Cyclocondensation and Phenyliodine Diacetate Mediated Oxidative Dehydrogenation

Authors

  • Ran Cheng

    Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. of China   Fax: +86(22)27404031   eMail: duyunfeier@tju.edu.cn   eMail: kangzhao@tju.edu.cn
  • Tianjian Guo

    Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. of China   Fax: +86(22)27404031   eMail: duyunfeier@tju.edu.cn   eMail: kangzhao@tju.edu.cn
  • Daisy Zhang-Negrerie

    Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. of China   Fax: +86(22)27404031   eMail: duyunfeier@tju.edu.cn   eMail: kangzhao@tju.edu.cn
  • Yunfei Du*

    Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. of China   Fax: +86(22)27404031   eMail: duyunfeier@tju.edu.cn   eMail: kangzhao@tju.edu.cn
  • Kang Zhao*

    Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. of China   Fax: +86(22)27404031   eMail: duyunfeier@tju.edu.cn   eMail: kangzhao@tju.edu.cn
Weitere Informationen

Publikationsverlauf

Received: 18. Juni 2013

Accepted after revision: 23. Juli 2013

Publikationsdatum:
15. August 2013 (online)


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Abstract

A variety of 4(3H)-quinazolinones are synthesized conveniently in one pot from 2-aminobenzamides and aldehydes, via cyclization catalyzed by p-toluenesulfonic acid followed by oxidative dehydrogenation mediated by the hypervalent iodine compound phenyliodine diacetate [PhI(OAc)2, PIDA]. Highlights of the described method include the first synthesis of quinazolinones bearing an N-alkoxy substituent, a new application of phenyliodine diacetate as an efficient dehydrogenative oxidant, and mild reaction conditions.

Supporting Information