Process for the preparation of urethanes

Details Process for the preparation of urethanes Process for the preparation of urethanes

1984-05-14

1986-06-10

Mars, Howard T.

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

Organic compounds

Carboxylic acid esters

560 24, 560 27, 560 29, 560 30, 560 31, 560 32, 560115, 560157, 560158, 560160, 560161, C07C12506, C07C12507

Patent

active

045944415

ABSTRACT:
A process for the preparation of urethanes. Urethanes having the general formula R.sub.1 (NHCOOR.sub.2).sub.n are reacted with an alcohol at a temperature of 120.degree. to 400.degree. C. in amounts such that, for every mol of the urethane, at least one mol of the alcohol is present. R.sub.1 is a radical obtained by removing the isocyanate groups from an n-functional organic isocyanate, which isocyanate has a boiling point greater than 100.degree. C. at atmospheric pressure. R.sub.2 is a radical obtained by removing the hydroxyl group from a monohydric alcohol which has a boiling point greater than 140.degree. C. at atmospheric pressure.

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Groggins, Unit Processes in Organic Synthesis, 5th Ed. 1958, McGraw-Hill-New York, p. 713.
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"Synthetic Organic Chemistry", Wagner et al., (1953), pp. 486-487 and 647.
Volodarskaya et al, Chem. Absts., 81, 64083(j), 1974.
Sal'nikova et al, Chem. Absts., 69, 85886(r), 1968.
Kraft, J.A.C.S., 70, 3570 (1948).

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