1-Chloro-4-(chloromethyl)benzene → 1-[(4-Chlorophenyl)methyl]-4,4,6-trimethylcyclohex-2-en-1-ol

Beteiligte Stoffe

Reaktionsschritte

To a slurry of magnesium turnings (66 g, 2.73 g.atoms) in diethyl ether (300 ml) was added a solution of 4-chlorobenzyl chloride (418 g, 2.6 moles) in diethyl ether (1500 ml) at such a rate as to maintain gentle reflux. After a further 30 minutes, a solution of 4,4,6-trimethylcyclohex-2-en-1-one (340 g, 2.46 moles) in diethyl ether (350 ml) was added, again maintaining a gentle reflux. After 1 hour the mixture was added into saturated aqueous ammonium chloride (4 liters) and the phases separated. The ether phase was back-washed with water (1 liter) and used directly in the next reaction. A small portion of 1-(4-chlorobenzyl)-4,4,6-trimethylcyclohex-2-en-1-ol was isolated for characterisation (gas chromatography analysis showed two isomers in approximately equal amounts).

Herkunft & Nachweise