Process for preparing aromatic urethanes

Details Process for preparing aromatic urethanes Process for preparing aromatic urethanes

1978-07-25

1980-10-07

Breitenstein, G. T.

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

Organic compounds

Carboxylic acid esters

560 24, 560 26, C07C12504

Patent

active

042270081

ABSTRACT:
Aromatic urethanes can be produced by interacting an aromatic primary amino compound having a nitro group, a nitroso group or a carbamate group, an organic compound having at least one hydroxyl group, and carbon monoxide in the presence of a catalytic system composed of a platinum group metal and/or a compound thereof serving as catalyst and a Lewis acid and/or a compound thereof as promoter under high temperature and high pressure conditions. For instance, the interaction of 2-amino-4-nitrotoluene, ethanol and carbon monoxide in the presence of palladium chloride and a ferrous chloride-pyridine complex under high temperature and high pressure conditions can yield 2,4-diethylcarbamatetoluene.

REFERENCES:
patent: 3338956 (1967-08-01), Mountfield
patent: 3531512 (1970-09-01), Hardy
patent: 3993685 (1976-11-01), Zajacek et al.

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