Thionyl Chloride → HCID 20310099, compound

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Reaction Steps

To 6.0 g. of 1-cyanoindan-4-carboxylic acid are added 20 ml. of chloroform and 80 ml. of thionyl chloride and the mixture is allowed to stand at room temperature for 15 hours. The excess thionyl chloride and chloroform are distilled off under reduced pressure. To 1-cyanoindan-4-carbonyl chloride, which is thus obtained as the distillation residue, is added 100 ml. of chlorobenzene, followed by stirring under cooling with ice. Then, 6.0 g. of anhydrous aluminum chloride powder is added and the temperature is gradually increased to about 80° C, at which temperature the reaction mixture is stirred for 2.5 hours. After cooling, ice-hydrochloric acid is added, followed by extraction with ether. The extract is washed with water and dried. Then, the solvent is distilled off under reduced pressure and the residue obtained is purified by column chromatography on silica gel (700 g. silica gel; eluant: chloroform). The described procedure gives 4-(p-chlorobenzoyl)indan-1-carbonitrile as an oily product.

Provenance & Evidence