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Class Information
Number: 552/643
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Cyclopentanohydrophenanthrene ring system containing > Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system > Carbon bonded directly at the 13-position (e.g., 19-norandrostenes, estradienes, etc.) > Carbon or halogen bonded directly at the 1-, 2-, 4- or 5-position
Description: Compounds wherein carbon or halogen is bonded directly at the 1-, 2-, 4-, or 5-position of the cyclopentanohydrophenanthrene ring system.










Patents under this class:

Patent Number Title Of Patent Date Issued
8586770 Unsaturated steroid compounds Nov. 19, 2013
7550451 Progesterone receptor modulators with increased antigonadotropic activity for female birth control and hormone replacement therapy Jun. 23, 2009
6462211 4-halogenated steroids, their preparation process and intermediates, their use as medicaments and the pharmaceutical compositions containing them Oct. 8, 2002
5908944 Methylation or ethylation agent and process for 1,4-addition of a methyl or ethyl group to an .alpha., .beta.-unsaturated keto compound Jun. 1, 1999
5723455 Antiandrogenic agents and related pharmaceutical compositions and methods of use Mar. 3, 1998
5391778 2-iodo-3-keto-.DELTA..sup.4 steroids, process for their production, as well as their further processing Feb. 21, 1995
5276023 19-nor-steroid esters Jan. 4, 1994
5166146 Amino acid cyclopentanophenonthrene compounds Nov. 24, 1992
5041433 11-keto or hydroxy 3,5-diene steroids as inhibitors of steriod 5-.alpha.-reductase Aug. 20, 1991
4659516 Steroid derivatives Apr. 21, 1987
4547493 Novel 11.beta.-substituted-19-nor-steroids Oct. 15, 1985
4464302 17-[(Hydroxymethyl)formamido-methylene]-steroids Aug. 7, 1984
4346037 Base catalyzed acylation with enol esters Aug. 24, 1982
4312864 Branched chain and cycloaliphatic esters of the androstane and destrane series and pharmaceutical compositions containing same Jan. 26, 1982
4307086 Branched chain and cycloaliphatic esters of the androstane and destrane series and pharmaceutical compositions containing same Dec. 22, 1981
4307087 Branched chain and cycloaliphatic esters of the androstane and oestrane series and pharmaceutical compositions containing same Dec. 22, 1981
4212864 Branched chain and cycloaliphatic esters of the androstane and oestrane series and pharmaceutical compositions containing same Jul. 15, 1980
4119625 Process for the manufacture of steroid carboxylic acids and the esters thereof Oct. 10, 1978
4052421 13-Ethinyl-steroids and processes for their manufacture Oct. 4, 1977
4044004 Total steroid synthesis employing substituted isoxazole derivatives Aug. 23, 1977











 
 
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