7-Nitro-1-tetralone → NSC174091

Participants

Reaction Steps

A mixture of 5 g of 7-nitro-3,4-dihydronaphthalen-1(2H)-one, 2.18 g of hydroxylamine hydrochloride, 4.29 g of sodium acetate in 90 ml of ethanol and 90 ml of water is refluxed for one hour. The reaction medium is brought back to ambient temperature and an aqueous 10% sodium bicarbonate solution is added until a pH of 7 is reached. The mixture is extracted with ethyl acetate and the organic phase is dried over magnesium sulfate, filtered and concentrated under reduced pressure. Purification is carried out by flash chromatography on silica gel (40-63 μm), elution being carried out with a mixture of heptane and of ethyl acetate (80/20 to 50/50). 1.14 g of (1E)-N-hydroxy-7-nitro-3,4-dihydronaphthalen-1(2H)-imine are obtained in the form of a yellow solid.

Provenance & Evidence