2,5-Dihydroxybenzoic acid → HCID 20600087, compound

Participants

Reaction Conditions

Reaction Steps

2.78 g (18.0 mmol) 2,5-dihydroxybenzoic acid was dissolved in 36 ml dimethylformamide. 2.96 ml (19.8 mmol) 1,8-diazabicyclo[5.4.0]undec-7-ene(1,5-5) (DBU) was added dropwise in the course of 15 minutes. The reaction temperature rose to 30° C. and 8.83 g (19.8 mmol) 3,5-dinitrobenzoic acid 11-bromoundecyl ester was subsequently added in one portion. The mixture was then heated at 80° C. for 2 hours. The reaction mixture was cooled and then partitioned between dichloromethane and 1N hydrochloric acid; the organic phase was washed twice with water, dried over sodium sulfate, filtered and concentrated by rotary evaporation. Chromatography of the residue on 200 g silica gel using Toluene yielded 5.28 g (57%) 3,5-dinitrobenzoic acid 11-[2,5-dihydroxybenzoyloxy]undecyl ester as yellow powder.

Provenance & Evidence