Tetrahydrofuran → N-(3-Chloro-4-fluoro-phenyl)-2-{2,6-dichloro-3-[(2,2-dimethyl-propionylamino)-methyl]-phenylamino}-6-(2-fluoroethoxy)-1-methyl-1H-benzimidazole-5-carboxylic acid amide

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Reaction Steps

A mixture of N-(3-chloro-4-fluorophenyl)-2-(2-fluoroethoxy)-4-methylamino-5-nitro-benzamide (67.9 mg, 0.176 mmol), Pd/C (15 mg) and 10 mL THF is stirred under a H2-atmosphere (3 bar) for 8 h. The crude mixture is filtered into a flask charged with N-(2,4-dichloro-3-isothiocyanato-benzyl)-2,2-dimethyl-propionamide (59 mg, 0.185 mmol) and concentrated to ˜5 mL. The mixture is stirred for 2 h at rt and concentrated i. vac. The mixture is diluted with MeCN (2.0 mL), DIC (29 μl, 0.186 mmol) is added and it is stirred overnight at rt and 2 h at 60° C. The mixture is cooled to rt and the resulting precipitate is filtered off, washed with MeCN, redissolved in dioxane/MeCN and a few drops of HCOOH and lyophilized.

Provenance & Evidence