Synthetic methods for preparing deoxycholic acid and intermediates thereof, high purity synthetic deoxycholic acid, compositions and methods of use are provided. Also, provided are processes for the synthesis of 12-keto or 12-α-hydroxy-steroids from Δ-9,11-ene, 11-keto or 11-hydroxy-β-steroids. This invention is also directed to novel compounds prepared during the synthesis. This invention is also directed to the synthesis of deoxycholic acid starting from hydrocortisone.
Diethylhydrogensilyl cyclic diethylsilylene derivatives in gas chromatography-mass spectrometry of hydroxylated steroids. II. Pregnanes with a hydroxylated 17.BETA.-side-chain.
The gas chromatographic-mass spectrometric properties of diethylhydrogensilyl cyclic diethylsilylene derivatives of hydroxypregnanes were studied. Pregnanes with a sterically hindered 11β-hydroxyl group were smoothly silylated with a new silylating agent, N, O-bis(diethylhydrogensilyl)-trifluoroacetamide, under mild conditions. The mass spectra of these derivatives were characterized by the appearance of the intense molecular ion peak, which provides convenient and reliable confirmation of the molecular weight of these hydroxypregnanes. The most characteristic fragment ions were those at m/z 185 for 17, 20-diols and at m/z 287 for 17, 20, 21-triols, which were produced by cleavage at the C(13)-C(17) and C(15)-C(16) bonds with hydrogen atom transfer. This indicates that all of the major fragmentations are directed by the cyclic diethylsilylene group. Another fragmentation common to the spectra was the successive loss of diethylhydrogensilanol from the molecular ion. A remarkable difference in the appearance of peaks was observed between DEHS-DES derivatives of a 17α, 20α, 21-triol and its 20β-isomer. Structures are proposed for some of these fragment ions.
PURIFIED DEOXYCHOLIC ACID AND ITS COSMETIC USE IN THE NON-SURGICAL REMOVAL OF UNDESIRABLE FAT DEPOSITS
申请人:Kythera Biopharmaceuticals, Inc.
公开号:EP3040342A1
公开(公告)日:2016-07-06
Compositions of deoxycholic acid (DCA) containing a steroidal DCA precursor or by-product containing a 12.beta.-hydroxy group (in particular 12.beta.-DCA) and their use in a cosmetic method of non-surgical removal of undesirable fat deposits.
Synthetic methods for preparing deoxycholic acid and intermediates thereof, high purity synthetic deoxycholic acid, compositions and methods of use are provided. Also, provided are processes for the synthesis of 12-keto or 12-α-hydroxysteroids from Δ-9,11-ene, 11-keto or 11-hydroxy-β-steroids. This invention is also directed to novel compounds prepared during the synthesis. This invention is also directed to the synthesis of deoxycholic acid starting from hydrocortisone.