1-Hydroxybenzotriazole → HCID 57529761, compound

Participants

Reaction Steps

A solution of 150 mg (0.25 mmol) of (R)-1-carboxy-2-(3,5-dibromo-phenyl)-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate, 90 mg (0.28 mmol) TBTU, 95 μL (0.55 mmol) ethyldiisopropylamine and 38 mg (0.28 mmol) HOBt in 6 mL DMF was stirred for 90 min at RT. Then 42 mg (0.33 mmol) 4-dimethylamino-piperidine were added and the reaction mixture was stirred for 16 h at RT. The reaction solution was combined with water, the organic phase was evaporated down and the residue was purified by chromatography (silica gel, DCM/MeOH/NH3 95:5:0.5).

Provenance & Evidence