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anjchem

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A solution of the crude 2,3-Benzbromarone in ethanol (10 ml) was added dropwise under nitrogen to a stirred ice-cold solution of Ethylamine gas (10.0 g, 0.32 mole) in ethanol (130 ml) during 50 min, and the mixture was stirred a t 0" for an additional 40 min. A mixture of 12 N HCl (30 ml) and ice was added to pH < 7, and the aqueous solution was extracted with ether and evaporated to dryness.
The yellow solid was extracted with chloroform (4 X 50 ml), and the re-
sidual Ethylamine hydrochloride was discarded. Evaporation of the
chloroform filtrates gave an off-white solid, which was recrystallized twice
from ethanol-acetone to give 3.4 g (17%) of 2,3-Bzrone hydrochlo-
ride as off-white crystals, mp 117-119' [lit. (21) mp 116-117'];
TLC in chloro-form-2-propanol-triethylamine (62:35:3) showed a single spot, Rf
0.55.

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