The invention provides a new derivative of vitamin D, 23,23-difluoro-25-hydroxycholecalciferol, a method for preparing said compound and various new intermediates utilized in such process. The compound is characterized by vitamin D-like activity as evidenced by its ability to increase intestinal calcium transport and serum calcium. It is further characterized by its resistance to hydroxylation at C-23, which is recognized as an essential metabolic step to the inactivation of vitamin D, and therefore should provide vitamin D-like activity of greater time duration.
本发明提供了一种新的
维生素D衍
生物,23,23-二
氟-25-羟基胆
钙化醇,以及制备该化合物的方法和在该过程中使用的各种新
中间体。该化合物具有类似
维生素D的活性,表现为其增加肠道
钙转运和血清
钙的能力。它还具有对C-23的羟化的抵抗力,这被认为是
维生素D失活的一个必要代谢步骤,因此应该提供更长时间的类似
维生素D的活性。