1,2-Dichloroethane → HCID 66855227, compound

Participants

Reaction Steps

To a solution of 1.50 g 4-((S)-4-Carboxy-2-{[5-[2-((S)-2-cyclobutylcarbamoyl-pyrrolidin-1-yl)-2-oxo-ethoxy]-1-(3,4-difluoro-phenyl)-1H-pyrazole-3-carbonyl]-amino}-butyryl)-piperazine-1-carboxylic acid ethyl ester in 25 ml dichloromethane were added 481 mg EDC, 306 mg DMAP and 617 μl ethanol. After 3 h the reaction mixture was concentrated and the residue purified by preparative HPLC (C18 reverse phase column, elution with a water/MeCN gradient with 0.1% TFA). The fractions containing the product were lyophilized to yield the pure product. Yield: 520 mg MS (ES+): m/e=746.

Provenance & Evidence