Synthesis 2005(10): 1605-1610  
DOI: 10.1055/s-2005-865305
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Direct One-Pot Synthesis of Naphtho[2,3-b]furan-4,9-dione Derivatives via C,O-Dialkylation of β-Dicarbonyl Compounds by 2,3-Dichloro-1,4-naphthoquinones

Hua-You Hu, Ye Zhu, Lei Wang, Jian-Hua Xu*
Department of Chemistry, Nanjing University, Nanjing 210093, P. R. China
Fax: +86(25)83317761; e-Mail: xujh@nju.edu.cn;
Further Information

Publication History

Received 10 December 2004
Publication Date:
12 April 2005 (online)

Abstract

Base-promoted reactions of acyclic and cyclic β-dicarbonyl compounds (3) with 2,3-dichloro-1,4-naphthoquinone (1) and 4a,6,7,8a-tetrachloro-1,4-methanonaphthalene-5,8-dione (2) resulted in C,O-dialkylation of 3 to give 2,3-disubstituted naphtho[2,3-b]furan-4,9-diones (4) and 5,8-methanonaphtho[2,3-b]furan-4,9-diones (6) respectively in moderate to high yields.