Process for preparing aromatic urethanes
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsKatsuharu Miyata, Makoto Aiga, Seiji Hasegawa
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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.
Claims14
A process for producing an aromatic urethane comprising 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 comprising a palladium catalyst and a complex of a Lewis acid with a nitrogen-containing aromatic heterocyclic compound or with an organic phosphorus compound under high temperature and high pressure conditions.
Dependencies are inferred from the claim text.