Hydrochloric Acid → HCID 58965325, compound

Participants

Reaction Conditions

Reaction Steps

To a 250 mL 3-necked flask equipped with a mechanical stirrer, thermometer, condenser and nitrogen inlet is added 1.8 g of potassium hydroxide and 40 mL of methanol. The mixture is warmed to 40° C. to dissolve the potassium hydroxide. To this solution is added 2.7 g of 5-carbomethoxy-2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H -benzotriazole, prepared in Example 36, in 40 mL of methanol. The reaction mixture is refluxed for six hours. The mixture is then cooled and acidified with hydrochloric acid. Ether and ethyl acetate are added, and the organic layer is separated and dried over anhydrous sodium sulfate. After vacuum stripping of the solvent, 2.5 g of 5-carboxy-2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazole is isolated.

Provenance & Evidence