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:
Oct. 10, 1978
Filed:
Apr. 08, 1977
Julius Schmidlin, Basel, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
The present invention provides a novel process for the manufacture of 17- and 17a-carboxylic acids of the androstane and D-homo-androstane series respectively, of the following partial formula of the ring D ##STR1## wherein R represents a hydrogen atom or an unsubstituted or substituted hydrocarbon radical or a free or functionally modified hydroxyl group, and wherein the carboxyl group can be in the .alpha.- or .beta.-position, and of the salts and functional acid derivatives thereof, in particular their esters. The new process consists in the oxidative degradation of the side chain of corrsponding 20, 21-ketoaldehydes of the pregnane or D-homopregnane series or of the 17.alpha.-pregnane or 17a.alpha.-D-homopregnane series with an organic peracid in an inert solvent, preferably at temperatures between -20 and +30.degree. C, and optionally converting free functional groups present into their derivatives or setting free functional groups from substituents which are derivatives of such groups.