23,23-Difluoro-25-hydroxy-vitamin D.sub.3 and process for preparing same
申请人:Wisconsin Alumni Research Foundation
公开号:US04564474A1
公开(公告)日:1986-01-14
The invention provides new derivatives of vitamin D, 23,23-difluoro-25-hydroxycholecalciferol and the acylates thereof, a method for preparing said compounds and various new intermediates utilized in such process. The derivative compounds are characterized by vitamin D-like activity as evidenced by their ability to increase intestinal calcium transport and serum calcium. The compounds are further characterized by resistance to hydroxylation at C-23, which is recognized as an essential metabolic step to the inactivation of vitamin D. The compounds should, therefore, provide vitamin D-like activity of greater time duration.