4-Methylmorpholine → HCID 19705563, compound

Participants

Reaction Steps

A solution of α-[[[(4-methoxyphenyl)sulfonyl]amino]methyl]-3-(2-methylpropyl)-2-oxo-1-(2-phenylethyl)-3-pyrrolidineacetic acid (290 mg, 0.577 mmol) in dry CH2Cl2 (5 mL) is treated with CDI (112 mg, 0.692 mmol). Afar 1 h, 4-methylmorpholine (0.095 mL, 0.866 mmol) and O-benzylhydroxyamine HCl (138 mg, 0.866 mmol) are added. The solution is stirred at room temperature under N2 for 65 h. The solvent had evaporated, and the residual gel is diluted with EtOAc (25 mL). The solution is washed with 1N HCl (10 mL), 1N NaOH (10 mL), and brine (10 mL). The organic layer is dried over anhydrous MgSO4, filtered, and concentrated under reduced pressure to give 380 mg of an oil. The oil is purified by silica gel chromatography (30 g SG; 50% EtOAc/hexane) to provide 249 mg (71%) of the title compound as an oil:

Provenance & Evidence