The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
Apr. 15, 1975
Applicant:
Inventors:
Assignee:
Schering Aktiengesellschaft, Berlin & Bergkamen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
2603975 ;
Abstract
3-Hemisulfate sodium salts of 17.alpha.-hydroxy steroids of the formula ##STR1## wherein R.sub.1 is H, CH.sub.3 or C.sub.2 H.sub.5 and .DELTA. is one or more additional double bonds optionally present in the B and/or C rings are produced by treating a 17-mono ester of a carboxylic acid of up to 15 carbon atoms of the corresponding 3,17.alpha.-dihydroxy steroid with the reaction product of pyridine or like amine and sulfur trioxide or reactive functional derivative thereof and, without isolation thereof, saponifying the resultant reaction product with alkali, preferably a sodium alcoholate or hydroxide in a lower alcohol.