Synlett 2005(8): 1296-1300  
DOI: 10.1055/s-2005-865231
LETTER
© Georg Thieme Verlag Stuttgart · New York

Soluble Polymer-Supported Synthesis of 4-Methyl Coumarin on Modified Poly(ethylene glycol)s [1]

Graziella Tocco*, Michela Begala, Giovanna Delogu, Gabriele Meli, Carmen Picciau, Gianni Podda
Dipartimento Farmaco Chimico Tecnologico, Università degli Studi di Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
Fax: +39(070)6758553; e-Mail: toccog@unica.it;
Further Information

Publication History

Received 11 February 2005
Publication Date:
14 April 2005 (online)

Abstract

A simple liquid phase synthetic method for the preparation of 4-methyl coumarin on modified poly(ethylene glycol)s by using the von Pechmann reaction is described.

1

Presented at the 5th Spanish Italian Symposium on Organic Chemistry, Santiago de Compostela, Spain, 10-13 September 2004.

1

Presented at the 5th Spanish Italian Symposium on Organic Chemistry, Santiago de Compostela, Spain, 10-13 September 2004.

32

Analytical details for compounds 9 and 15. 9. 1H NMR (300 MHz, CDCl3): δ = 2.40 (s, 3 H), 3.36 (s, 3 H), 6.20 (s, 1 H), 6.80 (s, 4 J = 2.43 Hz, 1 H), 6.90 (d, 3 J = 8.50 Hz, 4 J = 2.43 Hz, 1 H), 7.60 (s, 3 J = 8.50 Hz, 1 H). 15. 1H NMR (300 MHz, CDCl3): δ = 1.81 (m, 2 H), 2.40 (s, 3 H), 2.70 (t, 2 H), 3.36 (s, 3 H), 3.92 (t, 2 H), 6.18 (d, 3 J = 8.50 Hz, 2 H), 6.30 (s, 1 H), 6.81 (d, 3 J = 8.41, 1 H), 6.88 (s, 1 H), 6.98 (d, 3 J = 8.50, 2 H), 7.50 (d, 3 J = 8.41, 1 H).