第三节 炔烃的制备 7.3.1二卤代烷脱卤化氢 eg (CH3)3CCHCHCk- aNH2 (CH)aCC=CNa-2o (CH3):CC=CH △ 50-60% NaNH2 CH3(CH2)CHCH2Br CH:(CH)-C=CNa H0, CH(CH2)C:CH Br △ 54% 如用弱碱在较低温度下反应，则得到乙烯式卤代烃. KOH.90C CH CH2CHCICHCICHCH CH:CH2CH-CCICH2CH3 丙酮 90% RCHCH2OH→RCH=CH+ RCH-CH2→RCH=CH X第三节 炔烃的制备 7.3.1 二卤代烷脱卤化氢 NaNH2 (CH3 ) (CH3 ) 3CCH2CHCl 2 3CC CNa H2O (CH3 ) 3CC CH 50~60% CH3 (CH2 ) 7CHCH2Br Br NaNH2 CH3 (CH2 ) 7C CNa H2O CH3 (CH2 ) 7C CH 54% eg RCH2 CH2OH RCH=CH2 RCH CH2 X X RCH CH CH3 CH2 CHClCHClCH2 CH3 KOH,90 0 C 丙酮 CH3 CH2 CH=CClCH2 CH3 90% 如用弱碱在较低温度下反应,则得到乙烯式卤代烃