Synthesis 2003(8): 1241-1247
DOI: 10.1055/s-2003-39397
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Yb(OTf)3-Catalyzed One-Pot Synthesis of Quinazolin-4(3H)-ones from Anthranilic­ Acid, Amines and Ortho Esters (or Formic Acid) in Solvent-Free Conditions

Limin Wang*a, Jianjun Xiaa, Fang Qina, Changtao Qianb, Jie Sunb
a Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Lu, Shanghai 200237, P. R. China
Fax: +86(21)64252288; e-Mail: wanglimin@ecust.edu.cn, wcathy@china.com;
b Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, P. R. China
Further Information

Publication History

Received 20 November 2002
Publication Date:
26 May 2003 (online)

Abstract

An efficient synthesis of an array of quinazolin-4(3H)-ones from anthranilic acid, ortho esters (or formic acid) and amines using Yb(OTf)3 in one-pot under solvent-free conditions is described. Compared with the classical reaction conditions, this new synthetic method has the advantage of excellent yields (75-99%), shorter reaction time (few minutes) and reusability of the catalyst.