Synthesis 2005(18): 3026-3034  
DOI: 10.1055/s-2005-916031
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Concise Route for the Synthesis of Pyranonaphthoquinone Derivatives

Yong Rok Lee*,a, Jung Hyun Choia, Dinh Thi Lan Trinha, Nam Woo Kimb
a School of Chemical Engineering and Technology, Yeungnam University, Gyeongsan 712-749, Korea
Fax: +82(53)8104631; e-Mail: yrlee@yu.ac.kr;
b Department of Herbal Biotechnology, Daegu Hanny University, Gyeongsan 712-751, Korea
Further Information

Publication History

Received 14 March 2005
Publication Date:
06 October 2005 (online)

Abstract

An efficient synthesis of pyranonaphthoquinones is achieved by ethylenediamine diacetate-catalyzed reactions of 4-hydroxy-2-quinolones with a variety of α,β-unsaturated aldehydes in moderate yields. This method provides a rapid entry into biologically interesting α-lapachone derivatives with a variety of substituents on the pyran ring.