ES265558A1 - Procedure for the preparation of 1-methyl-string derivatives (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of 1-methyl-string derivatives (Machine-translation by Google Translate, not legally binding)
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Merck KGaA
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E Merck AG
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Publication of ES265558A1publicationCriticalpatent/ES265558A1/en
Procedure for the preparation of 1-methyl estratriene derivatives, characterized in that a compound of formula I is transposed **(See formula)** R1 = (see formula), u = 0 R2 = H, lower alkyl, alkenyl, or ethynyl R3 = H, or acyl, by treatment with a strong acid in the presence of an acid anhydride in a 1-methyl estratriene derivative of formula II **(See formula)** R1 has the indicated meaning R4 = acyl, optionally saponifying in the ester (II) thus obtained the 0-acyl group found on carbon atom 3, in a hydroxyl group, and optionally etherifying or esterifying the latter again. (Machine-translation by Google Translate, not legally binding)
ES0265558A1960-03-111961-03-10Procedure for the preparation of 1-methyl-string derivatives (Machine-translation by Google Translate, not legally binding)
ExpiredES265558A1
(en)
A procedure for the preparation of 3-or2'-amino tiazolo - (5 ', 4'-16,17) - estra 1,3,5 (10), 16-tetraens. (Machine-translation by Google Translate, not legally binding)