4-Hydroxybenzaldehyde → HCID 54514261, compound

Participants

Reaction Steps

0.6 g of N,N'-dicyclodicyclohexylcarbodiimide was added at room temperature while stirring to a solution of 1.0 g of 4-[4-(2-amino-5-nitro-4-[(S)-2-octyloxy]phenyl)benzoic acid, 0.3 g of 4-hydroxybenzaldehyde and 0.04 g of 4-dimethylaminopyridine in 20 ml of dichloromethane. The reaction mixture was stirred at room temperature overnight, poured into 100 ml of water and then extracted three times with 50 ml of dichloromethane each time. The organic phases were washed twice with 100 ml of water each time, dried over magnesium sulphate, filtered and the filtrate was subsequently concentrated. Chromatographic purification of the residue on silica gel with hexane/ethyl acetate (vol. 1:1) and two-fold recrystallization from ethanol of the fractions which were pure according to thin-layer chromatography gave 0.9 g of 4-[4-(2-amino-5-nitro-4-[(S)-2-octyloxy]phenyl)benzoyloxy]benzaldehyde; m.p. (C-I) 77°-78° C.

Provenance & Evidence