水解脱羧 COOC2H5 COONa R-CH NaOH (1)H+ R-CH R-CH2COOH COOC2H5 H2O COONa (2)A -CO2 R、。COOC2H5 NaOH (1)H+ R-CHCOOH R COOC2H5 H20 (2)△-C02 R' COOC2H5 NaOH (1)H+ COOC2H5 COOH H20 (2)△-C02 水解脱羧 R CH COOC2 H5 COOC2 H5 NaOH H2 O R CH COONa COONa (1) H (2) CO2 R CH2 COOH R C R' COOC2 H5 COOC2 H5 NaOH H2 O (1) H (2) CO2 R CHCOOH R' COOC2 H5 COOC2 H5 NaOH H2 O (1) H (2) CO2 COOH