Synthesis 2012; 44(20): 3179-3184
DOI: 10.1055/s-0032-1316773
paper
© Georg Thieme Verlag Stuttgart · New York

Functionalized Carbodiimide Mediated Synthesis of 2,3-Disubstituted Quinazolin-4(3H)-ones via the Tandem Strategy of C-Nucleophilic Addition and Intramolecular NH-Substitution Cyclization

Hayato Nakano
Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan   Fax: +81(3)52614631   Email: tsaito@rs.kagu.tus.ac.jp
,
Noriki Kutsumura
Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan   Fax: +81(3)52614631   Email: tsaito@rs.kagu.tus.ac.jp
,
Takao Saito*
Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan   Fax: +81(3)52614631   Email: tsaito@rs.kagu.tus.ac.jp
› Author Affiliations
Further Information

Publication History

Received: 12 July 2012

Accepted after revision: 18 August 2012

Publication Date:
06 September 2012 (online)


Abstract

A facile synthesis of quinazolin-4(3H)-ones possessing carbon substituents at positions 2 and 3 has been developed. Key to the synthesis is a tandem strategy involving introduction of a 2-substituent and construction of the quinazolinone framework via C-nucleophilic addition to the carbodiimide cumulenic carbon followed by intramolecular nucleophilic substitution by the newly formed NH moiety at the proximal ester group.

Supporting Information