ES346457A1 - A motor vehicle suspension device. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Procedure for obtaining Δ 3,5-7α-methyl-ostradiene, of formula **(See formula)** wherein R1 means a free, esterified or etherized hydroxyl radical and R2 a hydrogen atom or a saturated or unsaturated, unsubstituted or halogenated, lower aliphatic hydrocarbon moiety, and R1 and R2 together represent an oxo radical, characterized in that, at, in the compounds of formula I, in which R1 together with R2 represents a free or protected oxo radical, a protected oxo radical is released and/or an oxo radical is reduced to a hydroxy radical, optionally under simultaneous introduction into the position 17 of a saturated or unsaturated, unsubstituted or halogenated, lower aliphatic hydrocarbon, and, if desired, a hydroxy radical is esterified or etherified, or in the compounds of formula I, in which R1 represents a free hydroxyl radical or esterified or etherized, according to methods known per se, an esterified or etherized hydroxyl radical is liberated and/or if desired, a free hydroxy radical is standardized or etherified or oxidized to the oxo radical, or b, in the compounds of formula **(See formula)** where R1 and R2 have the meaning indicated above for formula I R3 means a free or esterified hydroxyl radical, and which show a double bond starting from the carbon atom at 5, the R3 moiety dissociates in the form of water or of acid, or c, compounds of formula **(See formula)** Where R1 and R2 have the meaning indicated above for formula I and Bz represents a benzyl radical, they are treated with Raney nickel, or d, in the compounds of formula **(See formula)** Where R1-R3 have the meaning indicated above for formula II, the R3 moiety dissociates in the form of either water or acid, or e, the compounds of formula **(See formula)** in which R1 and R2 have the meaning indicated above for formula I, they are brominated in a manner known per se and the dibromic compounds obtained are dehydrobrominated in a manner known per se. (Machine-translation by Google Translate, not legally binding)