Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH901863Aexternal-prioritypatent/CH437277A/en
Priority claimed from CH150364Aexternal-prioritypatent/CH448075A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES302202A2publicationCriticalpatent/ES302202A2/en
Improvements introduced in the object of the main patent No. 286.306, granted on July 22, 1963, by: "Procedure for obtaining A-nor-B-homoesteroids", specifically for the preparation of 3-oxo-A-nor-B -homo-steroids of the series of pregnanes of the formulas ** (See formula) ** where R1 and R2 each represent a free or esterified hydroxyl group and R1 may also be an etherified hydroxyl group and R2 is a hydrogen atom or a methyl group, characterized in that the compounds of the formula. ** (See formula) ** where R2 and R3 have the meaning indicated above, they are irradiated with ultraviolet light and, if desired, the obtained compounds are treated with acylating or etherifying means or with hydrolyzing media. (Machine-translation by Google Translate, not legally binding)
ES0302202A1963-07-191964-07-17Procedure for obtaining a-nor-b-homosteroids. (Machine-translation by Google Translate, not legally binding)
ExpiredES302202A2
(en)