Process for the production of...

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C - Chemistry, Metallurgy

07

J

260/15, 260/81,

C07J 7/00 (2006.01) C07J 43/00 (2006.01)

Patent

CA 2033065

ABSTRACT OF THE DISCLOSURE process for the production of 21-bromine-4-pregnene-3,20- dion derivatives of the general formula Image (1) wherein R1 is a hydrogen atom, a hydroxy group, or an alkanoyl group with up to 6 carbon atoms; R2 is a hydrogen atom or a methyl group, or wherein R1 and R2 together represent a isopropylidenedioxy group wherein R3 stands for a hydrogen atom, a fluorine atom, or a methyl group; V is a methylene group or an ethylene group; X is a hydrogen atom, a fluorine atom, or a chlorine atom; and Y stands for a methylene group, hydroxymethylene group, or a carbonyl group, is described.

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