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 CH3、 OH KOH ￥CH3-C一C三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-CH3CHOH CH3CHCHCH2CH3 KOH-C2H5OH →CH3C≡CCH2CH3 BrBr