Preparation of urethanes

Details Preparation of urethanes Preparation of urethanes

1988-11-22

1991-04-16

Gray, Bruce

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

Organic compounds

Carboxylic acid esters

560 25, 560 26, 560 28, 560 32, 560115, 560132, 560134, 560157, 560158, 560163, 560164, 560166, C07C26100

Patent

active

050084356

ABSTRACT:
Process for producing urethanes, by reacting an organic hydroxyl group containing compound and carbon monoxide, either (i) with an organic nitro group containing compound, e.g. nitrobenzene, or (ii) with a primary amine, e.g. aniline, and oxygen, the reacting in both cases being carried out in the presence of a non-noble metal catalyst system comprising a copper catalyst, preferably mixed with a promoter such as a nitrogen or phosphorous containing organic compound for the (i) nitro compound reaction, or an alkali salt for the (ii) amine reaction, e.g. at 200-8000 psig and 100.degree.-300.degree. C., using 0.05-0.4 mole copper catalyst and 0.01-10 moles promoter per mole (i) nitro compound or (ii) amine, and 2-500 moles carbon monoxide, and (in the case of the (ii) amine) 0.5-5 moles oxygen, per mole of the (i) nitro compound or (ii) amine.

REFERENCES:
patent: 3338956 (1967-08-01), Mountfield et al.
patent: 3454620 (1969-07-01), Gamlen et al.
patent: 3993685 (1976-11-01), Zajacek et al.
patent: 4603216 (1986-07-01), Grate et al.

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