Nuclear hydrogenation of n-aryl carbamates

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

REFERENCES:
patent: 3511875 (1970-05-01), Brantley
patent: 3567764 (1971-03-01), Brantley
patent: 3600426 (1971-08-01), Grant et al.
patent: 3691234 (1972-09-01), Kiefer et al.
patent: 3699149 (1972-10-01), Yamamura et al.
patent: 3867443 (1975-02-01), Malz, Jr. et al.
Scopes et al., J. Chem. Soc., 1972, 2810-2811.
Weaver et al., Chem. and Ind., 4, pp. 187-188 (1973).
Weaver et al., Preprints, General Papers, Div. of Petrol. Chem., 18 (1), pp. 196-199 (1973).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Nuclear hydrogenation of n-aryl carbamates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nuclear hydrogenation of n-aryl carbamates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear hydrogenation of n-aryl carbamates will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2282094

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.