Dimethylformamide dimethyl acetal → HCID 68466006, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-[3-(2-chloroethoxy)phenyl]-3-oxo-butyronitrile (16.0 g, 67.0 mmol) in 100 mL anhydrous DMF was added DMF-DMA (19.7 mL, 148 mmol) and TEA (9.4 mL, 67.0 mmol), and the solution was heated at 100° C. for 2.5 h. The reaction mixture was concentrated in vacuo and the residue was dissolved in CH2Cl2, passed through Magnesol® and concentrated. The crude material was then stirred with 3,4-dimethoxybenzylamine (11 mL, 74 mmol) in 100 mL of anhydrous toluene at reflux for 2 h. The reaction was cooled, concentrated in vacuo, and purified by flash chromatography on silica gel eluting with EtOAc to yield 11.8 g (41% yield) of 5-[3-(2-chloroethoxy)phenyl]-1-(3,4-dimethoxybenzyl)-4-oxo-1,4-dihydro-pyridine-3-carbonitrile as an off-white solid.

Provenance & Evidence