Synthesis 2003(15): 2331-2334  
DOI: 10.1055/s-2003-41061
PAPER
© Georg Thieme Verlag Stuttgart · New York

One-Pot Synthesis of 3-Carboxycoumarins via Consecutive Knoevenagel and Pinner Reactions in Water

Francesco Fringuelli, Oriana Piermatti*, Ferdinando Pizzo*
Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
e-Mail: pizzo@unipg.it;
Further Information

Publication History

Received 20 May 2003
Publication Date:
23 September 2003 (online)

Abstract

Chloro-, hydroxy-, methoxy-, and tert-butyl-substituted 3-carboxycoumarins have been prepared by one-pot procedure by reaction of suitably substituted salicylaldehydes with malononitrile in water. The over-all yields are high and the protocol does not require organic solvents.