4.4.5亲核加成 HC=CH CH3OH->CH2=CHOCH3 亲核试剂 CH=CH CH3COOH->CH2=CHOCCH3 亲核试剂 0 CH OH KOH HC=CH CH3-C-C=CH 亲核试剂 CH3 CH3 4.5炔烃的制备 1.二卤代烷脱卤化氢 常用的试剂：NaNH2,KOH-CH3CH2OH CH3CHCHCH2CH3 KOH-C2H5OH >CH3C=CCH2CH3 BrBr4.4.5 亲核加成 HC CH + CH3OH CH2 CHOCH3 亲核试剂 CH CH + CH3COOH CH2 CHOCCH3 亲核试剂 O HC CH + C O CH3 CH3 KOH CH3 C OH CH3 C CH 亲核试剂 4.5 炔烃的制备 1. 二卤代烷脱卤化氢 常用的试剂：NaNH2 , KOH-CH3CH2OH CH3CHCHCH2CH3 Br Br KOH-C2H5OH CH3C CCH2CH3