4)酮酯缩合 酮的c-H比酯的o-H活泼。 0 1)NaH 00 CH3CCH3 CH3(CH2)4COOC2Hs CH3(CH2)4CCH2CCH3 2)H中 OCH3 O OCH3 O COOCH3 CH3CH-CIACCH3 COOCH; CH3O CH3O CHCH2CCH Na2CO3 Claisen缩合 CH3O H3( OCH3 CH3O O O COOCH3 H CH3CH=CH-CCH3 O OCH3 CH3O O O COOCH3 CHCH2CCH3 CH3 O Na2CO3 Claisen缩合 OCH3 CH3O O O H3C O O CH3CCH3 O + CH3 (CH2 ) 4COOC2H5 1) NaH CH3 (CH2 ) 4CCH2CCH3 O O 2) H+ 酮的-H比酯的-H活泼。 4) 酮酯缩合