Terephthaloyl chloride → 2H-Azepin-2-one, 1,1'-(1,4-phenylenedicarbonyl)bis[hexahydro-

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Reaction Steps

Terephthaloyl chloride (51 g, 0.25 mol) is added in the course of 30 minutes to a solution of ε-caprolactam (56.6 g, 0.5 mol) in 400 ml of cyclohexane and 117 ml of pyridine at room temperature. The mixture is then refluxed for 4 h. After cooling, the resulting light yellow precipitate is filtered off by suction, washed with water and dried. Yield 81 g (91%).

Provenance & Evidence