Water → 3-(3-Cyclopentyloxy-4-methoxyanilino)-2-cyclopenten-1-one

Participants

Reaction Steps

1.04 g (5.02 mole) of 3-cyclopentyloxy-4-methoxyaniline, 0.51 g (5.02 mmole) of 1,3-cyclopentanedione, and 0.03 g of p-toluenesulfonic acid were dissolved in 30 ml of benzene and the solution was heated reflux in an apparatus fitted with a water separation tube for 3 hours, while azeotropically separating the water produced. After the reaction, the solution was cooled to room temperature, a yellow crystal was precipitated. The precipitated yellow crystal was collected by suction filtration, and the crystal was washed with diethyl ether, then dried to obtain the title compound 1.16 g (yield 80.4%) as a pale yellow crystal.

Provenance & Evidence