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答案 (1) COOC2Hs(2) COCH2 COCH3 5.实现下列转变 COOC2H5 (2) CHi COoC,H5 CH3, CH2 CH, CH, COCH3 COOC2H5 C=CHCOOC2H5 答案 (1) COOCH2CH3(1)NaOC2Hs (I)H,0 OH. (2) CH3CH2Br(2H3△ (I)Naoc?H Naoc2Hs (2)CH3 COOC2H5 CH3 COCH,COOCH (2)H3O△ BrCH, CH, Bl HO (3) HCN CH, COCI AlCI BrCH2CooC2Hs △ 6.用丙二酸二乙酯或乙酰乙酸乙酯制备下列化合物答案: (1) (2) O COOC2H5 COCH2COCH3 5. 实现下列转变: O COOC2H5 O C2H5 (1) (2) CH3COOC2H5 CH3COCH2CH2CH2CH2COCH3 O COOC2H5 O O O O (3) C CHCOOC2H5 CH3 (4) 答案: O COOCH2CH3 (1) (3) (1)NaOC2H5 (2)CH3CH2Br (1)H2O OH (2)H3O △ O HCN H3O △ △ H3O Zn BrCH2COOC2H5 CH3COCl AlCl3 (4) (2) CH3COOC2H5 (1)NaOC2H5 CH3COCH2COOC2H5 (2)H3O △ NaOC2H5 BrCH2CH2Br △ H3O 6. 用丙二酸二乙酯或乙酰乙酸乙酯制备下列化合物:
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