PhOCH, H Acid Derivatives COOH All can be converted to the carboxylic acid by acidic or basic hydrolysis. Esters and amides common in nature. R8xR8oQRR8。gR8 ,R一C=N RCOX (RCO)20 RCOOR RCONH2 RCN Chapter 21 2Chapter 21 2 Acid Derivatives • All can be converted to the carboxylic acid by acidic or basic hydrolysis. • Esters and amides common in nature. => R C O X R C O O C O R' R C O O R R C O NH2 R C N RCOX (RCO)2O RCOOR RCONH2 RCN