Process of preparation of novel rhodium hydrogenation...

Details Process of preparation of novel rhodium hydrogenation... Process of preparation of novel rhodium hydrogenation...

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 31/12 (2006.01) B01J 31/18 (2006.01) B01J 31/24 (2006.01) C07B 35/00 (2006.01) C07B 35/02 (2006.01) C07C 5/03 (2006.01) C07C 5/05 (2006.01) C07C 237/48 (2006.01) C07F 15/00 (2006.01)

Patent

CA 1296327

ABSTRACT The present invention refers to complexes prepared by reacting rhodium trinitrate with a suitable hydrazine and a suitable tertiary phosphine, more specifically to the compounds di(µ-hydrazine-N1:N2)-bis[bis( riphenylpnos- phine)rhodium (I) ]dinitrate and µ-3-carbopentazane-N1,N4:N2,N5-bis[bis(tri- phenylphosphine)rhodium (I) ]dinitrate, 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 a-6-deoxy-5-hydroxy-tetra- cycline (doxycycline).

539016

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