4-Methylmorpholine → HCID 12017812, compound

Participants

Reaction Conditions

Reaction Steps

(S)-2-[(Azepane-1-carbonyl)-amino]-4-methyl-pentanoic acid (0.39 g, 1.5 mmol, Example 1, Step B) was dissolved in dry DMF (5 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added, in succession, N-methylmorpholine (0.66 mL, 6.0 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (0.60 g, 1.6 mmol). The resulting reaction mixture was stirred at that temperature for 30 minutes; then a solution of 3-(3-amino-propyl)-1-methyl-3-phenyl-1,3-dihydro-indol-2-one monohydrochloride monohydrate (0.49 g, 1.5 mmol) in dry DMF (7 mL) was added. After additional 20 minutes stirring at 0° C., the ice-water bath was removed and the reaction mixture was stirred and allowed to warm up to ambient temperature for 15 minutes. The reaction mixture was poured into 50 mL of EtOAc, the resulting mixture was successively washed with 3% aqueous HCl solution, brine, saturated aqueous NaHCO3 solution, brine, and was dried over Na2SO4. The solution was concentrated in vacuo affording a white solid. Recrystallization from EtOAc-hexanes afforded 0.56 g (72%) of the pure titled compound as a white powder: mp 181-182° C. APCI-MS m/z 519.1 (MH+).

Provenance & Evidence