Process for the production of...

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C - Chemistry, Metallurgy

07

J

C07J 75/00 (2006.01) C07J 71/00 (2006.01)

Patent

CA 2430196

The invention relates to a process for the preparation of 16,17- [(cyclohexylmethylene)bis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20- dione[11.beta.,16.alpha.(R)] and similar compounds, by reaction of an appropri- ate 16,17-ketal with cyclohexanealdehyde.

L'invention concerne un procédé de préparation de 16,17-[(cyclohéxylméthylène)bis(oxy)]-11,21-dihydroxypregna-1,4-diène-3,20-dione[11.beta.,16a(R)] et de composés similaires. Ce procédé consiste à faire réagir un cétal 16,17 approprié avec du cyclohéxanealdéhyde.

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