Process for preparing aromatic urethanes

Details Process for preparing aromatic urethanes Process for preparing aromatic urethanes

1976-03-08

1979-10-09

Garner, Vivian

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

Organic compounds

Carboxylic acid esters

260239BE, 2603463, 544 37, 560 9, 560 13, 560 14, 560 25, 560 26, 560 27, 560 28, 560 29, 560 30, 560 31, 560 32, 560 33, 544282, C07C12506

Patent

active

041707087

ABSTRACT:
Aromatic urethanes are produced by interacting an aromatic nitro compound, an organic compound containing hydroxyl groups and carbon monoxide in the presence of a catalyst composed of elemental selenium or a selenium compound and of a promoter composed of a bicyclic amidine together with a phenolic compound or a carboxylic acid. The interaction proceeds smoothly with the aid of a small amount of the promoter, attended with secondary production of amino compounds only in small amounts. For instance, 2,4-diethyldicarbamatetoluene is obtained at a yield of 87% by interacting 2,4-dinitrotoluene, ethanol and carbon monoxide in the presence of a catalytic system composed of metallic selenium, 1,8-diazabicyclo(5,4,0)-undecene-7 and acetic acid.

REFERENCES:
patent: 3895054 (1975-07-01), Zajacek et al.

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