Meerwein Reaction Cuc N≡NCI+ -CH-CHCN 10~30 CI CN HCI CHCH-〈 CH-COrganic Chemistry Organic Chemistry Xiamen Xiamen University University Meerwein Reaction Meerwein Reaction N N Cl - + + CH CHCN CuCl 2 10 ~ 3 0 CH CH Cl CN CH C CN -HCl