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Syntex SA
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Syntex SA
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Application filed by Syntex SAfiledCriticalSyntex SA
Priority to ES0243540ApriorityCriticalpatent/ES243540A1/en
Publication of ES243540A1publicationCriticalpatent/ES243540A1/en
Process for obtaining halogenopregnenoscaracterizadoca because 3-enol ether or 3-ketals of compounds of the formula ** where r1 r2 and r <sup > 3 means hydrogen or a free hydroxy group or esterified r4 hydrogen or a methyl groupx hydrogenation atom of chlorine or fluoroy two atoms of hydrogenation group oxoo hydrogen and an esterified or free hydroxy group that in position 20 show hydrogen or a free or esterified hydroxy group or a free oxo or ketalized group treated with a chlorinating agent; the oxo ketalized groups in position 3 and 20 or 20-hydroxy groups are transformed into oxo-compound groups obtained from delta4 -3-oxo-6 β -chloro is isomerized to δ4 -3-oxo-6 α -chloro and at any reaction stage the esterified hydroxy groups are hydrolyzed or the free hydroxy groups they are esterified. (Machine-translation by Google Translate, not legally binding)
ES0243540A1958-08-091958-08-09Procedure for obtaining halogenopregnene (Machine-translation by Google Translate, not legally binding)
ExpiredES243540A1
(en)