1,2-Dichloroethane → HCID 86590297, compound

Participants

Reaction Steps

To a solution of (cyclopropylmethyl)(methylsulfonyl)-(2-piperazinyl-phenyl)amine (HCl salt, 2.3 g, 6.0 mmol), (2S)-3-[(tert-butyl)oxycarbonyl]-2-[(4-chlorophenyl)-methyl]propanoic acid (1.8 g, 6.02 mmol, Step 4), HOBt (0.81 g, 6.0 mmol, Novabiochem), and TEA (1.67 mL, 12.0 mmol) in 20 mL of CH2Cl2 at 0° C. was added EDC (1.73 g, 9.03 mmol, Advanced Chemtech). The reaction was warmed to RT and stirred for 12 h. The reaction was quenched with satd NaHCO3, extracted with 80 mL of EtOAc and the organic solution was washed with brine, dried over Na2SO4 and concentrated in vacuo. The compound was further purified by silica gel column chromatography (50% EtOAc in hexane) to provide 2.3 g of tert-butyl (3S)-3-[(4-chlorophenyl)-methyl]-4-(4-{2-[(cyclopropylmethyl)(methylsulfonyl)-amino]phenyl}-piperazinyl)-4-oxobutanoate as a white foam. MS (ESI, pos. ion) m/z: 590.6 (M+1). Calc'd for C30H40ClN3O5S: 589.24. Anal. Calcd for C30H40ClN3O5S: C, 61.05; H, 6.83; N, 7.12; Cl, 6.01. Found: C, 60.91; H, 6.69; N, 7.09; Cl, 6.16.

Provenance & Evidence