Synthesis of psoralen analogues based on dibenzofuran

…, MMM Raposo, AMF Oliveira??Campos…

Index: Oliveira, Ana M. A. G.; Raposo, M. Manuela M.; Oliveira-Campos, Ana M. F.; Griffiths, John; Machado, Antonio E. H. Helvetica Chimica Acta, 2003 , vol. 86, # 8 p. 2900 - 2907

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Citation Number: 24

Abstract

Abstract The syntheses of four novel psoralen derivatives, 6a–d, of the benzofurocoumarin (= benzofuro [1] benzopyranone) type containing an ester group are described. These compounds might be of interest in PUVA (psoralen long-wave ultraviolet radiation) therapy. The overall efficiency of the synthetic procedure is greatly limited by the low yields for the penultimate step, ie, formylation of the dibenzofuranols 3a, c or protected dibenzofuranol ...

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