Process for the preparation of arylhydroxylamines

Details Process for the preparation of arylhydroxylamines Process for the preparation of arylhydroxylamines

B - Operations, Transporting

01

J

260/591.5, 260/5

B01J 31/28 (2006.01) B01J 23/42 (2006.01)

Patent

CA 1212124

PROCESS FOR THE PREPARATION OF ARYLHYDROXYLAMINES Abstract of the Invention A process for producing arylhydroxylamines in high yield with minimal formation of by-product arylamines. A charge mixture is prepared comprising a nitroaryl compound, a platinum catalyst, a base, a sulfur compound, and a solvent for the nitroaryl compound. The sulfur compound is one in which divalent sulfur is bonded to two other moieties or a compound reducible to such divalent sulfur compound under cat- alytic hydrogenation conditions. Hydrogen is introduced into the mixture while the mixture is agitated at a temperature in a range of 0-40°C thereby reducing the nitro group of the nitroaryl compound to the hydroxylamine group.

420155

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