Dimethylformamide → HCID 68153712, compound

Participants

Reaction Conditions

Reaction Steps

A solution of N-(oxomethylene)sulfamoyl chloride (23.9 μL, 0.27 mmol) in THF (200.0 μL) was slowly added to a solution of 1-tert-butyl 2′-ethyl 3′,4′-dihydro-2′H-spiro[piperidine-4,1′-pyrrolo[1,2-a]pyrazine]-1,2′-dicarboxylate (100 mg, 0.27 mmol) in THF (1.0 mL) at −78° C. under nitrogen. The reaction mixture was stirred for 1 hour at −78° C. N,N-dimethylformamide (39.9 μL, 0.51 mmol) was then slowly added to the cold reaction mixture. The reaction mixture was then allowed to slowly warm to room temperature. The reaction was filtered and purified by reverse phase preparatory-LC-MS (10-99% CH3CN/H2O) using HCl modifier to give 1-tert-butyl 2′-ethyl 6′-cyano-3′,4′-dihydro-2′H-spiro[piperidine-4,1′-pyrrolo[1,2-a]pyrazine]-1,2′-dicarboxylate. ESI-MS m/z calc. 388.2, found 389.3 (M+1)+; Retention time: 1.82 minutes (3 minute run).

Provenance & Evidence