HCID 14721899, compound → HCID 14721900, compound

Participants

Reaction Steps

A solution of 154 g of the 2-(4-chlorobenzyl)-3-(2-methylpropoxy)-5,5-dimethylcyclohex-2-en-1-one obtained in Example 1 in 1200 ml methanol containing 3 g p-toluenesulphonic acid was refluxed for 2 hours. The reaction mixture was then extracted with 3 liters water and 1 liter diethyl ether and re-extracted with a further 1 liter diethyl ether. The organic phases were then back-washed first with 200 ml 10% aqueous sodium hydroxide and then with 100 ml saturated sodium chloride solution, dried over anhydrous magnesium sulphate and flashed. The residue was then crystallized in 60/80 petroleum, filtered and air-dried to give 98 g 2-(4-chlorobenzyl)-3-methoxy-5,5-dimethylcyclohex-2-en-1-one as a white solid, m.pt 62°-63° C. Yield: 73%.

Provenance & Evidence