Disclosed are new 1α-hydroxy vitamin D₇ of formula (I) and 1α-hydroxy vitamin D₄ of formula (II) which are useful as active ingredients of pharmaceutical compositions for the treatment of osteoporosis.
Those new compounds are synthesized starting from (22E)-5α,8α-(4-phenyl-1,2-urazolo)-6,22-ergostadien-3β-ol 3β-tert-butyl-dimethylsilyl ether and through ten process steps.
本发明涉及新的1α-羟基
维生素D₇化合物(式(I))和1α-羟基
维生素D₄化合物(式(II)),它们可用作制备药物组合物的活性成分,用于治疗骨质疏松症。这些新化合物是从(22E)-5α,8α-(4-苯基-1,2-
尿唑)-6,22-麦角甾二烯-3β-醇3β-叔丁基二甲基
硅基醚开始合成,经过十个步骤。