Gope消除:顺式消除过程(环状过渡态) CH3 CH? CHCH 3 CH3CH2CHC3△ N(CH3)2 F-N(CH3)2 CH3 CH=CHCH3 CH3 CH2CH=CH2 +(CH3)2N-OH 35% 65% 分子内环状过渡态机制 H八/N(CH3)2 δ+Cope消除：顺式消除过程（环状过渡态） CH3CH2CHCH3 CH3CH=CHCH3 + CH3CH2CH=CH2 [O] O N(CH3)2 CH3CH2CHCH3 N(CH3)2  + (CH3)2N OH 35% 65% H O N(CH3) 2 +  - 分子内环状过渡态机制