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
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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 ES302201A2publicationCriticalpatent/ES302201A2/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", from the oestranic series of the formulas ** (See formula) ** wherein R1 and R4 each represent a free or esterified or etherified hydroxy group, R2 a methyl group and R3 a hydrogen atom or a methyl group, and their 1-dehydro derivatives, characterized in that the compounds of the formula ** (See formula) ** or their 1-dehydro derivatives, in which formula R1-R3 have the meaning indicated above, are irradiated with ultraviolet light, or because the compounds of the formula ** (See formula) ** where R1-R3 have the meaning indicated above, are hydrated and, if desired, in the obtained compounds the free hydroxyl groups are esterified or etherified in arbitrary sequence or the esterified or etherized hydroxyl groups are released and/or in the obtained compounds, that in position 1,2 show a double union, this is desaturated. (Machine-translation by Google Translate, not legally binding)
ES0302201A1963-07-191964-07-17Procedure for obtaining a-nor-b-homosteroids. (Machine-translation by Google Translate, not legally binding)
ExpiredES302201A2
(en)
Procedure for the obtaining of steroids of the pregnan series, replaced by chlorine in the position 2. (Machine-translation by Google Translate, not legally binding)