1,2-Dichloroethane → HCID 24756976, compound

Participants

Reaction Steps

A mixture of 4-(4-{(E)-3-[6-((E)-2-carboxy-vinyl)-pyridin-3-yl]-acryloyl}-benzyl)-piperazine-1-carboxylic acid tert-butyl ester potassium salt (250 mg, 0.48 mmol), HOBT (130 mg, 0.96 mmol), EDC (184 mg, 0.96 mmol), TEA (0.134 ml, 0.96 mmol) and NH2OTHP (84 mg, 0.72 mmol) in DMF (4 ml) and DCM (4 ml) was stirred at room temperature for 5 h. The solution was diluted with DCM and washed with water and brine. The organic phase was dried over Na2SO4 and evaporated in vacuo. The crude mixture was purified by column chromatography (eluent: DCM/MeOH/NH4OH 95:5:0.1) and the resulting product was dissolved in DCM and treated with HCl/Et2O for 4 h. The resulting precipitate was filtered and purified by preparative LC-MS to give 40 mg of (E)-N-hydroxy-3-{5-[(E)-3-oxo-3-(4-piperazin-1-ylmethyl-phenyl)-propenyl]-pyridin-2-yl}-acrylamide as its formate salt.

Provenance & Evidence