2-Cyclopenten-1-one → Phenylcyclopentadiene

Participants

Reaction Steps

100 ml (1.2 mol) of 2-cyclopenten-1-one in 400 ml of diethyl ether are added dropwise to 2.3 mol of phenyllithium in 1000 ml of diethyl ether at −5° C. After hydrolysis and extraction of the aqueous phase with the diethyl ether, the combined organic phases are dried over sodium sulfate. After the solvent has been stripped off, 205 g of crude product are obtained. The product is heated to 180° C. for three hours in a vigorous argon stream in a

Provenance & Evidence