METHODS AND COMPOUNDS FOR PREPARING 3ALPHA-OXYGEN SUBSTITUTED STEROIDS
申请人:Ge Yu
公开号:US20120214987A1
公开(公告)日:2012-08-23
The invention relates to processes for preparing 3α-O-linked steroids including 3α-O-linked-androst-5-ene steroids and 3α-O-linked-5a-androstane steroids. In one process a 3α,4α-epoxy androst-5-en-17-one is predominately reduced at the epoxy moiety wherein reduction of the 3α,4α epoxy functional group occurs preferentially at position C4 with retention of configuration at position C3 to provide a 3α-O-linked-androst-5-ene steroid. In another process, conditions are provided for inversion of configuration of a 3β-hydroxy-androst-5-ene steroid by the Mitsunobu reaction to provide a 3α-O-linked-androst-5-ene steroid with reduced amounts of 3α,5α-cycloandrostane side-product impurities.
A mild method for the preparation of unsaturated alcohols from 1,3-glycols via dimethylformamide acetals
作者:Mark J. Ackland、John F. Gordon、James R. Hanson、Boon Leng Yeoh、Arnold H. Ratcliffe
DOI:10.1039/c39870001756
日期:——
Provided it possesses a hydrogen atom suitably placed for elimination, a 1,3-glycol may be converted into an unsaturatedalcohol via quaternization of its dimethylformamide acetal.
Ackland, Mark J.; Gordon, John F.; Hanson, James R., Journal of the Chemical Society. Perkin transactions I, 1988, p. 2013 - 2018
作者:Ackland, Mark J.、Gordon, John F.、Hanson, James R.、Yeoh, Boon Leng、Ratcliffe, Arnold H.
DOI:——
日期:——
ACKLAND, MARK J.;GORDON, JOHN F.;HANSON, JAMES R.;YEOH, BOON LENG;RATCLIF+, J. CHEM. SOC. PERKIN TRANS. PT 1,(1988) N 7, C. 2013-2017
作者:ACKLAND, MARK J.、GORDON, JOHN F.、HANSON, JAMES R.、YEOH, BOON LENG、RATCLIF+
DOI:——
日期:——
PHARMACEUTICAL COMPOSITIONS
申请人:Shenzhen Pharmacin Co., Ltd.
公开号:US20200237784A1
公开(公告)日:2020-07-30
Provided are pharmaceutical compositions which comprise a mixture of a lipophilic active pharmaceutical ingredient, at least one long chain fatty acid or at least one fatty acid glyceride, a surfactant, and optionally an antioxidant. Also described are methods for preparing and using such pharmaceutical compositions. The active pharmaceutical ingredient in such a combination has improved bioavailability compared to the active pharmaceutical ingredient alone.