Sodium bis(trimethylsilyl)amide → HCID 68737330, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-oxoindoline-4-carbonitrile (2.97 g, 18.8 mmol; prepared as described in WO 00/21920) in THF (40 mL) was added dropwise a 1.0 M THF solution of NaHMDS (78.2 mL, 78.2 mmol) at about −78° C. under N2. After stirring at about −78° C. for about 30 min, N-benzylbis(2-chloroethyl)amine hydrochloride (4.20 g, 15.6 mmol) was added as a solid. The reaction mixture was stirred at about −78° C. for about 30 minutes and then allowed to warm to rt. The reaction mixture was then heated at reflux for 2 h. After cooling to about 0° C., the reaction was quenched by the addition of saturated aqueous NH4Cl solution. The reaction mixture was partitioned between EtOAc and water. The aqueous layer was extracted with EtOAc. The combined organic layers were washed with brine, dried and concentrated. The residue was purified by column chromatography (DCM:MeOH, 60:1) to give 1′-benzyl-2-oxospiro[indoline-3,4′-piperidine]-4-carbonitrile (2.10 g, 42%) as a solid. LCMS (APCI+) m/z 318 [M+H]+; Rt=2.42 min.

Provenance & Evidence