Benzene → 1,3-Cyclohexadiene-1-carboxylic acid, 2,6,6-trimethyl-, ethyl ester
Reaction equation
[CH3:1][C:2]1[CH:3]([C:10]([O:12][CH2:13][CH3:14])=[O:11])[C:4]([CH3:9])([CH3:8])[CH:5]=[CH:6][CH:7]=1.C1(C)C=CC(S(O)(=O)=O)=CC=1.C1C=CC=CC=1>CCCCC>[CH3:1][C:2]1[CH:7]=[CH:6][CH2:5][C:4]([CH3:8])([CH3:9])[C:3]=1[C:10]([O:12][CH2:13][CH3:14])=[O:11]Participants
5
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 2.0 g of 2,6,6-trimethyl-1-ethoxycarbonyl-2,4-cylohexadiene [prepared according to the process indicated in Example 1], 100 mg of p-toluenesulphonic acid and 25 ml of anhydrous benzene were refluxed for 4 hours in a nitrogen atmosphere. The resulting solution was diluted with pentane, washed with a 5 % solution of sodium bicarbonate, then with water, and then dried over Na2SO4 and concentrated.