The alkylangelicins according to the invention are obtained starting from an umbelliferone, in which the 6-position is already substituted by an alkyl group; in such a way the 7-allyloxy or 7-acyloxy umbelliferone intermediates can form by transposition of the allyl or acyl group only the 8-allyl and 8-acyl derivatives, and therefore the presence, even in traces, of psoralens is absolutely excluded in the subsequent synthetic steps. The 6-alkylangelicins thus obtained are particularly usable for the photochemotherapy of psoriasys and of other skin diseases characterized by cellular hyperproliferation, as well as for the photochemotherapy of vitiligo and of alopecia aerata.
本发明中的烷基天使光素是从已经被烷基取代的
香豆素开始制备的;这样,仅通过烯丙基或酰基基团的转位,就可以形成7-烯丙氧基或7-酰氧基
香豆素中间体,进而形成8-烯丙基和8-酰基衍
生物,因此,在随后的合成步骤中,即使是微量的光敏色素的存在也是绝对排除的。因此,这些6-烷基天使光素特别适用于
银屑病和其他细胞增殖过度的皮肤疾病的光
化学治疗,以及白癜风和斑秃的光
化学治疗。