Water → HCID 20313829, compound

Participants

Reaction Steps

Sodium hydride (50% dispersion in mineral oil; 155 mg) is slurried in 5 ml of anhydrous 1,2-dimethoxyethane and treated dropwise with N-(1,3-benzodithiol-2-ylidene)-1H-indol-3-ethanamine (1g, prepared as described in Example 30) in 5 ml of anhydrous 1,2-dimethoxyethane. The mixture is heated at reflux for 3 hours. A solution of α,p-dichlorotoluene (520 mg) in 5 ml of anhydrous 1,2-dimethoxyethane is added dropwise to the refluxing reaction mixture. Refluxing is continued for four hours after addition is complete. The reaction mixture is then poured into water (50 ml) and extracted with two 50 ml portions of dichloromethane. The combined dichloromethane extracts are washed with water and brine, dried over anhydrous sodium sulfate, and concentrated in vacuo. The resultant solid is chromatographed on silica gel (200 ml) eluting with dichloromethanepentane (1:1). The fractions containing product with Rf =0.8 (silica gel, dichloromethane) are concentrated. The solid thus obtained is recrystallized from hexane to yield 600 mg of the title compound, melting point 120°-121° C.

Provenance & Evidence