Dimethylformamide → HCID 89690493, compound

Participants

Reaction Steps

In a 40 ml scintillation vial equipped with a magnetic stir bar and a nitrogen inlet, the 2-chloro-4-[4-(2,5-dimethyl-phenyl)-piperazin-1-yl]-5-nitro-benzoic acid 12b (157.90 mg, 0.41 mmol) was taken up in clean, dry N,N-dimethylformamide (5.00 ml, 64.57 mmol) and the reaction mixture was stirred under nitrogen at room temperature until all solids had gone into solution. To the reaction was then added the HATU (184.80 mg, 0.49 mmol) followed by the N,N-diisopropylethylamine (0.14 ml, 0.80 mmol) and the mixture was stirred until all solids had gone into solution. The 3-dimethylaminomethyl-benzylamine (86.50 mg, 0.53 mmol) was then added to the reaction solution and the reaction was allowed to stir at room temperature overnight. The reaction was diluted with 15 ml of water and 15 ml of ethyl acetate. The layers were then separated and the product was extracted from the aqueous using ethyl acetate (3×20 ml). The organic phases were combined, washed with brine (1×25 ml) and with saturated aqueous lithium chloride solution (2×25 ml). The product solution was then dried over Na2SO4; the solution was then decanted and the solvent was removed under reduced pressure. The crude product, 2-chloro-N-(3-dimethylaminomethyl-benzyl)-4-[4-(2,5-dimethyl-phenyl)-piperazin-1-yl]-5-nitro-benzamide 13a (214.40 mg, 0.40 mmol), was isolated as an amber oil and was carried on without further purification. LCMS (m/e)=537 (M+H).

Provenance & Evidence