Triethylamine → (R)-1-(4-amino-3-chloro-5-trifluoromethyl-benzyl)-2-[4-(4-ethoxycarbonyl methyl-piperazin-1-yl)-4-methyl-piperidin-1-yl]-2-oxo-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

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Reaction Steps

0.10 mL (0.72 mmol) triethylamine were added to a mixture of 250 mg (0.45 mmol) (R)-2-(4-amino-3-chloro-5-trifluoromethyl-phenyl)-1-carboxy-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate (Example 1f), 140 mg (0.49 mmol) ethyl[4-(4-methyl-piperidin-4-yl)-piperazin-1-yl]-acetate (Example A8b) and 160 mg (0.50 mmol) TBTU in 2 mL DMF and the reaction mixture was stirred for 18 h at RT. It was evaporated down i. vac. and the residue was purified by chromatography (Alox, gradient DCM/MeOH 40:1 nach 30:1). The fractions containing the product were combined, evaporated down i. vac. and purified by HPLC; the fractions containing the product were combined and lyophilised.

Provenance & Evidence