Process for the preparation of N,O-disubstituted urethanes usefu

Details Process for the preparation of N,O-disubstituted urethanes usefu Process for the preparation of N,O-disubstituted urethanes usefu

1980-10-15

1984-02-07

Helfin, Bernard

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

Organic compounds

Carboxylic acid esters

2604654, 260465D, 260404, 260239E, 260938, 560 22, 560 25, 560 27, 560 28, 560 29, 560 30, 560 31, 560 32, 560115, 560145, 560157, 560158, 560160, 560161, 544164, 544322, 546312, 546334, 549 28, 549467, C07C125065, C07C125073

Patent

active

044305052

ABSTRACT:
A process for the preparation of N,O-disubstituted urethanes. Urea or polyurets, primary amines and alcohols are reacted at 120.degree.-350.degree. C. in the presence of N-substituted urethanes and/or N-mono- or N,N'-disubstituted ureas or polyureas. In a preferred embodiment, the reactants further include catalysts known to be useful in esterification of carboxylic acids. The urethanes produced in accordance with this process are particularly useful as starting materials for preparation of isocyanates.

REFERENCES:
patent: 2409712 (1946-10-01), Schweitzer
patent: 2806051 (1957-09-01), Brockway
patent: 3627813 (1971-12-01), Abbate et al.
patent: 4178455 (1979-12-01), Hirai et al.
patent: 4388238 (1983-06-01), Heitkamper et al.
Adams et al., Chemical Reviews (1965) vol. 65, 567-572.

Affiliated with

Also associated with

Rating

Process for the preparation of N,O-disubstituted urethanes usefu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of N,O-disubstituted urethanes usefu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of N,O-disubstituted urethanes usefu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2162846