Compounds of the general formula: ##STR1## wherein R.sub.1 represents a C1-10 alkyl group which may be substituted by one or more hydroxyl groups, R.sub.2 represents a hydrogen atom or a hydroxyl group, and R.sub.3 represents a hydrogen atom or a hydroxyl group; their intermediates; as well as synthesis processes of these compounds and intermediates are disclosed. The compounds of this invention, vitamin D derivatives substituted by sulfur atoms at the 22-position have a strong inhibitory effect against proliferation of keratinocytes.
本发明揭示了一般式为:##STR1##其中R.sub.1代表C1-10烷基,可以被一个或多个羟基取代,R.sub.2代表氢原子或羟基,R.sub.3代表氢原子或羟基的化合物;它们的中间体;以及这些化合物和中间体的合成过程。本发明的化合物,
维生素D衍
生物在22位被
硫原子取代,对角质细胞增殖具有强烈的抑制作用。