作者:Ana M. A. G. Oliveira、M. Manuela M. Raposo、Ana M. F. Oliveira-Campos、John Griffiths、Antonio E. H. Machado
DOI:10.1002/hlca.200390237
日期:2003.8
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, i.e., formylation of the dibenzofuranols
描述了四个含酯基的苯并呋喃香豆素(=苯并呋喃[1]苯并吡喃酮)类型的四种补骨脂素衍生物6a - d的合成。这些化合物可能在PUVA(补骨脂素长波紫外线辐射)治疗中受到关注。该合成方法的总效率是由低的产率的倒数第二个步骤大大的限制,即,该dibenzofuranols的甲酰化3a中,Ç或保护dibenzofuranol 4D到羧醛5(方案4)。但是,从5a - d形成吡喃酮环的最后阶段进展顺利(方案5)。