Application of catalysts containing rhodium

Details Application of catalysts containing rhodium Application of catalysts containing rhodium

1987-05-15

1989-09-05

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

502166, C07C10319

Patent

active

048636398

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: 4500458 (1985-02-01), Villax et al.
patent: 4550096 (1985-10-01), Page et al.
patent: 4743699 (1988-05-01), Page et al.

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