3,4-Dichloroaniline → trans-2-(3,4-Dichloroanilino)cyclopentanol

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Reaction Steps

A solution of 50.0 g. (0.31 mole) of 3,4-dichloroaniline in100 ml. of cyclopentene oxide is refluxed for 7 days. The solution is evaporated and the residue triturated with 250 ml. of petroleum ether (b.p. 30°-60° C.) five times to remove unreacted 3,4-dichloroaniline. The residue is treated with excess ethereal hydrogen chloride and the resulting crude hydrochloride salt is recrystallized twice from a methanol/ethyl ether mixture to give trans-2-(3,4-dichloroanilino)cyclopentanol, 38.7 g. (44% yield), m.p. 167°-168° C. The ultraviolet, infrared and nuclear magnetic resonance spectra are consistent with the structure of this product.

Provenance & Evidence