Diisopropylethylamine → HCID 66977626, compound

Participants

Reaction Conditions

Reaction Steps

Method G—Step a To a mixture of 1-[3-(1H-Benzoimidazol-2-yl)-4-chloro-phenyl]-pyrrolidine-3-carboxylic acid (obtained as described in general method 2, step e) (0.01 g, 0.26 mmol) in dcm (4 mL), HATU (0.10 g, 0.29 mmol), diisopropylethylamine (DIPEA) (0.14 mL, 0.76 mmol) and tert-butyl-1-piperazine carboxylate (0.06 g, 0.32 mmol) were added. The reaction mixture was heated at 35° C. overnight, cooled to room temperature and washed with water (2×5 mL) and saturated Na2CO3 solution (2×5 mL). The organic layer was dried over Na2SO4, filtered and evaporated under reduced pressure to obtain a crude that was triturated with diethylether (3 mL), filtered and dried. The precipitate was then purified by flash chromatography (eluent gradient: EtOAc 100% to EtOAc:NH3 in MeOH (2M)/4:0.8), and then a filtration on an SCX cartridge was run (eluent gradient: DCM:MeOH/1:1 to NH3 in MeOH), to obtain 0.11 g of the title compound (67%).

Provenance & Evidence