Suggest the reagent and reaction condition Ph Ph Ph CO20 Ph

Suggest the reagent and reaction condition? Ph Ph Ph CO20% Ph CO H Ph Ph CO2CHa Ph Ph 0 Ph Ph Ph Tetraphenylphthalic Acid Tetraphenylphthalic Anhydride

Solution

Reaction 1: H2O /HCl, heat.

Conversion of ester to carboxylic acid is called ester hydrolysis.

Reaction 2: P2O5/Heat. Dehydration of carboxylic acid to anhydride.

P2O5 is dehydrating agent.