1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → 6-[((2E)-3-(4-{difluoro[4-(4,4,4-trifluorobutoxy)phenyl]methoxy}phenyl)prop-2-enoyl)oxy]hexyl 3,5-dinitrobenzoate

Participants

Reaction Conditions

Reaction Steps

3.68 g (11.8 mmol) of 6-hydroxyhexyl 3,5-dinitrobenzoate, 4.91 g (11.8 mmol) of (2E)-3-(4-{difluoro[4-(4,4,4-trifluorobutoxy)phenyl]methoxy}phenyl)prop-2-enoic acid, 144 mg (1.2 mmol) of 4-dimethylaminopyridine are dissolved in 30 mL of dichloromethane. 2.48 g (13.0 mmol) of N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC hydrochloride) is added at 0° C. The solution is stirred for 1 h at 0° C. and allowed to stir at room temperature overnight. After 22 hours at room temperature, the reaction mixture is partitioned between dichloromethane and water. The organic phase is washed repeatedly with water, dried over sodium sulfate, filtrated and concentrated under reduced pressure. Chromatography of the residue on 200 g silica gel using toluene: ethyl acetate 95:5 as eluent and crystallization from ethyl acetate:hexane mixture yielded 6.85 g of 6-[((2E)-3-(4-{difluoro[4-(4,4,4-trifluorobutoxy)phenyl]methoxy}phenyl)prop-2-enoyl)oxy]hexyl 3,5-dinitrobenzoate as yellow crystals.

Provenance & Evidence