Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1975-09-04
1978-01-17
Garner, Vivian
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560 5, C07C12506
Patent
active
040692400
ABSTRACT:
N-Alicyclic carbamates, useful in making polyurethanes, are prepared by nuclear hydrogenation of an N-aryl carbamate using a group VIII transition metal catalyst. E.g., dimethyl 4,4'-methylenedicarbanilate is contacted with hydrogen and ruthenium catalyst in 2-propanol medium, at 50.degree. C. for 1.3 hours under a pressure of 500-800 psi, to form dimethyl 4,4'-methylenedicyclohexylcarbamate. Acid activation of catalyst is a feature of the invention.
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Greenfield Harold
Malz, Jr. Russell E.
Garner Vivian
Long James J.
Uniroyal Inc.
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