Sodium hydride → HCID 10622766, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of NaH (0.224g, 7.48 mmol) and DMF (10 mL) was treated slowly with 2,6-piperidinedione (0.846 g, 7.48 mmol) at room temperature. After the addition was complete, the mixture was cooled to 0° C. and a solution of 3-[3-[[1-[2-(1-methylethoxy)phenyl]-4-piperazinyl]methyl]benzyl chloride (2.46 g, 7.12 mmol) and DMF (10 mL) was added dropwise. The cooling bath was removed and the reaction was stirred at room temperature overnight. A small portion of water was added and the reaction was concentrated under vacuum. The residue was partitioned between CH2Cl2 /water and the organic layer was separated, dried, and evaporated to give 1-[[3-[[1-[2-(1-methylethoxy)phenyl]-4-piperazinyl]methyl]phenyl]methyl]-piperidine-2,6-dione as an oil, 3.25 g. This material was dissolved in i-PrOH (13 mL) and treated with maleic acid (0.83 g, 7.15 mmol). Trituration with ether, filtration, and drying afforded 1-[[3-[[1-[2-(1-methylethoxy)phenyl]-4-piperazinyl]methyl]phenyl]methyl]-piperidine-2,6-dione (Z)-2-butenedioate (1:1) as a white solid (2.73 g, 70%), m.p. 103°-105° C. 1H NMR and mass spectral analysis supported the assigned structure.

Provenance & Evidence