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Synthesis 2003(9): 1373-1376
DOI: 10.1055/s-2003-40208
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

A Novel Method for the Synthesis of Oxazolocoumarin Derivatives

Essam Abdelghani*, Ali Abd El-Aal, Wesam Shehab, Medhat El-Mobayed
Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
e-Mail: e_abdelghani58@hotmail.com;
Further Information

Publication History

Received 24 February 2003
Publication Date:
24 June 2003 (online)

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Abstract

Anodic oxidation of 7-hydroxycoumarin derivatives 1a-f in anhyd acetonitrile-lithium perchlorate at constant potential between 1.70-1.80 V (vs. Ag/10-2 M Ag+) using an undivided cell and platinium gauze electrodes leads to the formation of the corresponding oxazolocoumarin derivatives 2 and/or 3 according to the position of the second OH group in the benzene ring of the coumarin derivatives 1e,f. The formation of these oxidation products is discussed.

Key words

oxidations - carbocations - coumarins - electrochemistry - quinones

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