4.脱水反应 <1>分子内脱水 CH3 CH2 CHCH 60%H2SO 13C=C 100°C OH CH 3 H3c-c-CH 20%H2SO4 H3C 3 C=CH2 90C OH H3C4.脱水反应: <1>分子内脱水 CH3CH2CHCH3 60% H2 SO4 100 o C 20% H2 SO4 90 o C OH C OH CH3 H3C CH3 C C H3C H H CH3 C CH2 H3C H3C