Synthesis 2013; 45(18): 2533-2544
DOI: 10.1055/s-0033-1338511
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Aroylguanidines by an Unexpected Demethylation–Addition Cascade

Ling Hui Gu
Key Laboratory of Drug-Targeting and Drug-Delivery Systems of the Ministry of Education, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   Fax: +86(28)85501613   Email: qiqingronghh@yahoo.com.cn
,
Zhen Guo*
Key Laboratory of Drug-Targeting and Drug-Delivery Systems of the Ministry of Education, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   Fax: +86(28)85501613   Email: qiqingronghh@yahoo.com.cn
,
Ling He
Key Laboratory of Drug-Targeting and Drug-Delivery Systems of the Ministry of Education, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   Fax: +86(28)85501613   Email: qiqingronghh@yahoo.com.cn
,
Qing Rong Qi*
Key Laboratory of Drug-Targeting and Drug-Delivery Systems of the Ministry of Education, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, 610041, P. R. of China   Fax: +86(28)85501613   Email: qiqingronghh@yahoo.com.cn
› Author Affiliations
Further Information

Publication History

Received: 06 May 2013

Accepted after revision: 30 June 2013

Publication Date:
01 August 2013 (online)


Abstract

A simple and efficient method was developed for the synthesis of N-aroyl-N′-arylguanidines under mild conditions by an unexpected demethylation–addition cascade reaction of readily available N-cyanoimidates with aryl amines. Moreover, 1-aryl-2-aminoquinazolin-4(1H)-ones and 2-(arylamino)quinazolin-4(3H)-ones can also be prepared by selective cyclization reactions of (2-fluorobenzoyl)- or (2-nitrobenzoyl)guanidines, respectively. This method provided two attractive strategies for the preparation 2-aminoquinazolinones derivatives from inexpensive reactants.

Supporting Information