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

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
› Author Affiliations
Further Information

Publication History

Received: 18 June 2013

Accepted after revision: 23 July 2013

Publication Date:
15 August 2013 (online)


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