Synthesis 2004(11): 1775-1782  
DOI: 10.1055/s-2004-829132
PAPER
© Georg Thieme Verlag Stuttgart · New York

Novel Short-Step Synthesis of Functionalized γ-Phenyl-β-hydroxybutenoates and their Cyclization to 4-Hydroxycoumarins via the N-Hydroxybenzotriazole Methodology

Giorgos Athanasellisa, Georgia Melagrakia, Haralambos Chatzidakisa, Antreas Afantitisa, Anastasia Detsia, Olga Igglessi-Markopoulou*a, John Markopoulosb
a National Technical University of Athens, School of Chemical Engineering, Laboratory of Organic Chemistry, Zografou Campus, Athens 15773, Greece
b University of Athens, Department of Chemistry, Laboratory of Inorganic Chemistry, Panepistimiopolis, Zografou, Athens 15771, Greece
Fax: +3(210)7723072; e-Mail: ojmark@orfeas.chemeng.ntua.gr;
Further Information

Publication History

Received 27 November 2003
Publication Date:
01 July 2004 (online)

Abstract

A novel method for the synthesis of functionalized 3-substituted 4-hydroxycoumarins is reported. C-Acylation compounds were derived from the reaction of the N-hydroxybenzotri­azole ester of the functionalized acetyl salicylic acids and a variety of active methylene compounds and cyclized to the title compounds. The synthesis is simple and the compounds are produced in yields varying from 39 to 80%. The structure of the newly prepared C-acylation compounds was thoroughly studied through NMR spectroscopy for the first time in the literature.