g只含一个-H的酯缩合时用更强的碱促使 平衡移动 E2(CH3)2CHCO2 C2H5 +(C6H3)CN3 ELO o cH ( CH3)2CH-C-CCO2C2H5 +( C6H5)3CH pKa 36 (C6H5)3C o cH C(CH3)2C-C-CCO2C2H5 CHOrganic Chemistry Organic Chemistry Xiamen Xiamen University University 只含一个α− H的酯缩合时用更强的碱促使 平衡移动 2 (CH 3 ) 2CHCO 2 C 2 H 5 + (C 6 H 5 ) 3 C − Na +

























Et 2 O + (C 6 H 5 ) (C H 3 ) 2CH C CCO 2 C 2 H 5 3 C H O CH 3 CH 3 (C H 3 ) 2 C C CCO 2 C 2 H 5 O CH 3 CH 3














(C 6 H 5 ) 3 C pKa 36