Acetyl chloride → (5R,7R)-4-(4-(acetamidomethyl)-1'-benzylspiro[indoline-3,4'-piperidine]-1-yl)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-yl 4-nitrobenzoate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of (5R,7R)-4-(4-(aminomethyl)-1′-benzylspiro[indoline-3,4′-piperidine]-1-yl)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-yl 4-nitrobenzoate trihydrochloride (30 mg, 0.042 mmol) and Et3N (0.034 mL, 0.19 mmol) in DCM (1 mL) was added acetyl chloride (0.0033 mL, 0.046 mmol) at about 0° C. under N2. The reaction was stirred at about 0° C. for about 30 minutes and diluted with DCM. The reaction mixture was washed with saturate aqueous NaHCO3 solution and brine, dried and concentrated. The residue was purified by flash chromatography on silica gel (2% MeOH/DCM) to give (5R,7R)-4-(4-(acetamidomethyl)-1′-benzylspiro[indoline-3,4′-piperidine]-1-yl)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-yl 4-nitrobenzoate (28 mg, 68%) as an oil. LCMS (APCI+) m/z 647 [M+H]+; Rt=3.21 min.

Provenance & Evidence