4-[(3,4-Difluorophenyl)amino]-6-nitro-3-quinolinecarbonitrile → 6-Amino-4-[(3,4-difluorophenyl)amino]-3-quinolinecarbonitrile

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Reaction Steps

A mixture of 4.53 g (13.9 mmol) 4-[(3,4-difluorophenyl)amino]-6-nitro-quinoline-3-carbonitrile, 200 ml ethanol and 15.72 g (69.4 mmol) SnCl2 dihydrate was heated to reflux under N2. Removed heat at 1½ hours, added ice water and made basic with sodium bicarbonate. Stirred for 2 hours and extracted with chloroform. Stirred organic layer with Darco, dried with sodium sulfate and filtered. Stripped solvent and dried in vacuo, giving 3.660 g of yellow-green solid: mass spectrum (electrospray m/e): M+H=297.1.

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