Synthesis 2004(9): 1466-1470  
DOI: 10.1055/s-2004-822360
PAPER
© Georg Thieme Verlag Stuttgart · New York

A Convenient Synthesis of Coumarins by Palladium(II)-Catalyzed Reaction of Phenols with Propiolic Acids

Masashi Kotania, Kiyomi Yamamotoa, Juzo Oyamadaa, Yuzo Fujiwarab, Tsugio Kitamura*a
a Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Honjo-machi, Saga 840-8502, Japan
Fax: +81(952)288548; e-Mail: kitamura@cc.saga-u.ac.jp;
b Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan
Further Information

Publication History

Received 14 April 2004
Publication Date:
12 May 2004 (online)

Abstract

A direct route to coumarin derivatives from phenols and propiolic acids has been developed. Phenols react with propiolic acids in the presence of Pd(OAc)2 as a catalyst to give coumarins in good yields. The simple process occurs under mild conditions without any additives.