Novel 1.alpha.-hydroxyvitamin D.sub.2 epimer and derivatives
申请人:——
公开号:US04973584A1
公开(公告)日:1990-11-27
The invention provides a new vitamin D.sub.2 compound, 1.alpha.-hydroxy-24-epi-vitamin D.sub.2 and certain hydroxy-protected derivatives thereof. The new compound exhibits a distinctive activity pattern comprising high potency in stimulating intestinal calcium transport and little or no activity in inducing bone calcium mobilization or the differentiation of undifferentiated cells in culture, thereby evincing utility in the treatment of diseases characterized by loss of bone mass.
Method for preparing intermediates for the synthesis of steroid side
申请人:Wisconsin Alumni Research Foundation
公开号:US05089647A1
公开(公告)日:1992-02-18
This invention provides a novel method for the preparation of optically active arylalykylsulfone derivatives, having a chiral center in the alkyl moiety in either the (R)- or the (S)-configuration. These optically active sulfones find use in the stereospecific synthesis of steroid or vitamin D compounds having chiral center at either carbon 24 or carbon 25 of the side chain. The method comprises the steps of reacting an optically active sulfinate ester having a chiral center at sulfur with a racemic alkyl Grignard reagent to obtain a mixture of diastereomeric sulfoxides, separating the mixture of diastereomeric sulfoxides, and oxidizing separately each of the diastereomers to obtain the desired optically active sulfone.
Method for preparing intermediates for the synthesis of steroid side chains in optically active form
申请人:WISCONSIN ALUMNI RESEARCH FOUNDATION
公开号:EP0386794A1
公开(公告)日:1990-09-12
This invention provides a novel method for the preparation of optically active arylalkylsulfone derivatives, having a chiral center in the alkyl moiety in either the (R)- or the (S)-configuration. These optically active sulfones find use in the stereospecific synthesis of steroid or vitamin D compounds having chiral center at either carbon 24 or carbon 25 of the side chain.
本发明提供了一种制备具有光学活性的芳基烷基砜衍生物的新方法,该衍生物的烷基中具有手性中心,且为(R)-或(S)-构型。这些光学活性砜可用于立体特异性合成侧链碳 24 或碳 25 具有手性中心的类固醇或维生素 D 化合物。
HETEROCYCLIC AMIDE COMPOUND AND USE THEREOF
申请人:Takeda Pharmaceutical Company Limited
公开号:EP1953148B1
公开(公告)日:2012-02-29
Novel 1 alpha-Hydroxyvitamin D2 epimer and derivatives