2、羧酸盐可用于制备酯或酸酐 COONa CH2CI Et3N COOCH2. 110°C,1h Et20 H2C=CCH2COOAg CICH3 H2C=CCH2COOCH3 RT,72h CH3 CH3 RCOOH CH2N2 Et2O RT RCOOCH3+N2 RCOONa CICOR'-RCOOCOR' Back 14 2、羧酸盐可用于制备酯或酸酐 2 2 2 3 2 14