Sodium hydride → HCID 13365280, compound

Participants

Reaction Steps

A suspension of 3.5 g 4-(4-dimethylaminophenyl)-2-methylthio-5-oxo-4-(3-pyridyl)-2-pyrroline-3-carbonitrile and 0.3 g sodium hydride (80% in white oil) is refluxed for one hour. One then adds dropwise thereto, within ten minutes, a solution of 1.3 g 3-dimethylaminopropyl chloride in 25 ml abs. dioxan and further boils for six hours. After cooling, the reaction mixture is filtered, the solvent is removed on a Rotavapor and the residue is chromatographed on silica gel with chloroform+methanol 10+1 as elution agent. After crystallization of the main fraction from isopropanol, one obtains 1.8 g of colorless crystals of mp 90°-91° C.

Provenance & Evidence