A main object of the invention is to provide a novel useful vitamin D3 derivative, which has an excellent vitamin D3 activity and, as compared with conventional vitamin D3 derivatives, has a relatively small amount of influence on the systemic calcium metabolism. The invention includes a 9,10-secopregnane derivative of the following general formula [1] and a pharmaceutical composition containing it as active ingredient.
In the general formula [1], the following partial structure between the 16-position and the 17-position means a single bond or a double bond:
Y is a single bond, an alkylene, an alkenylene or phenylene; R1 and R2 are the same or different, each represents hydrogen, an alkyl or a cycloalkyl; or R1 and R2, taken together with the adjacent carbon atom, form a cycloalkyl; R3 is hydrogen or methyl; Z is hydrogen, hydroxy or —NR11R12.
本发明的主要目的是提供一种新颖有用的
维生素D3衍
生物,其具有优异的
维生素D3活性,并且与传统的
维生素D3衍
生物相比,在系统
钙代谢方面具有相对较小的影响。该发明包括以下通式[1]的9,10-secopregnane衍
生物及其作为活性成分的制药组合物。在通式[1]中,16位和17位之间的以下部分结构表示单键或双键:Y是单键,烷基,烯基或苯基;R1和R2相同或不同,每个代表氢,烷基或环烷基;或R1和R2与相邻的碳原子结合形成环烷基;R3是氢或甲基;Z是氢,羟基或-NR11R12。