Preparation of a new catalyst containing rhodium

Details Preparation of a new catalyst containing rhodium Preparation of a new catalyst containing rhodium

1989-03-20

1990-11-06

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

556 23, B01J 3124, C07C10319

Patent

active

049686542

ABSTRACT:
The present invention refers to the compounds (.mu.-hydrazine-N.sup.1 :N.sup.2)-bis[bis(triphenylphosphine)-chlororhodium (I)] and di(.mu.-hydrazine-N.sup.1 :N.sup.2)-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).

REFERENCES:
patent: 4550096 (1985-10-01), Page et al.
patent: 4743699 (1988-05-01), Page et al.

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