Reaction. Into a solution of 10 mmol of the phenol ester in 50 mL of dry nitrobenzene” was added 100 mg of Nafion-H (prepared from Du Pont's commercial Ndion-501 resin K salt with nitric acid as described previously') and mixture refluxed with stirring for 12 h. At the end of this period the solution was cooled, and the catalyst was filtered and washed with ether. The filterate was extracted with 10% NaOH (3 X 50 mL), and the basic aqueous solution was ...
