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.
根据本发明,可以从
香豆素开始获得烷基天使光素,其中6位已经被烷基取代。这样,7-烯丙氧基或7-酰氧基
香豆素中间体只能通过烯丙基或酰基的转位形成8-烯丙基和8-酰基衍
生物,因此即使是微量的光敏色素在随后的合成步骤中也绝对不会存在。因此,所获得的6-烷基天使光素特别适用于
银屑病和其他细胞增生引起的皮肤疾病的光
化学治疗,以及白癜风和斑秃的光
化学治疗。