Process of preparation of novel rhodium hydrogenation catalysts

Details Process of preparation of novel rhodium hydrogenation catalysts Process of preparation of novel rhodium hydrogenation catalysts

1989-03-13

1990-03-27

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Tetracyclo naphthacene configured ring system having at...

502166, 556 21, C07B 0000, C07C10319, B01J 3124

Patent

active

049118650

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(.mu.-hydrazine-N.sup.1 :N.sup.2)-bis[bis(triphenylphosphine)rhodium (I)]dinitrate and .mu.-3-carbopentazane-N.sup.1, N.sup.4 :N.sup.2, N.sup.5 -bis[bis(triphenylphosphine)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 .alpha.-6-deoxy-5-hydroxy-tetracycline (doxycycline).

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