Diisopropylethylamine → HCID 69432991, compound

Participants

Reaction Steps

To [2-(2,4-Difluoro-phenyl)-2-piperazin-1-yl-ethyl]-carbamic acid methyl ester (516) (0.14 g, 0.47 mmol), 3-[1-Carboxy-2-(4-chloro-phenyl)-ethylcarbamoyl]-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (0.22 g, 0.47 mmol) and O-(7-Azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (0.178 g, 0.47 mmol) was added MeCl2 (1.0 mL) and DMF (0.2 mL) followed by DIPEA (0.82 mL, 4.7 mmol). The reaction was allowed to stir at room temperature for 4 h. The reaction mixture was then concentrated to dryness. The resulting residue was taken up in EtOAc (30 mL) and washed with sat. NaHCO3 (30 mL) and brine (30 mL). The organic phase was concentrated to dryness. The crude material was purified by chromatography (silica gel 60 mesh, eluting with a gradient of 100% EtOAc to 5% TEA/5% MeOH in EtOAc) yielding 0.34 g (98%) pure product.

Provenance & Evidence