Process of preparation of new catalysts containing rhodium...

Details Process of preparation of new catalysts containing rhodium... Process of preparation of new catalysts containing rhodium...

C - Chemistry, Metallurgy

07

C

260/429.4, 260/2

C07C 237/26 (2006.01) B01J 23/46 (2006.01) B01J 31/00 (2006.01) B01J 31/18 (2006.01) B01J 31/24 (2006.01) C07C 235/70 (2006.01) C07F 15/00 (2006.01)

Patent

CA 1338107

The present invention refers to the compounds (µ-hydrazine-N1:N2)- bis[bis(triphenylphosphine)-chlororhodium (I)] and di(µ-hydrazine-N1:N2)- bis[bis(triphenylphosphine)rhodium (I)] dichloride, which are homogenous hydrogenation catalysts and their application in the hydrogenation of the exocyclic methylene group of acid addition salts of 6-demethyl-6-deoxy-6- methylene-5-hydroxytetracycline (methacycline) to prepare .alpha.-6-deoxy-5- hydroxytetracycline (doxycycline).

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