CH3 CHCH2 2 →→CH3CH2CH2Br HBr NaoH H2O -CH3 CH,CH,OH-CuCH3 chocho OH HCN→CH3CH2CHCN OH H HO CH3 Ch2CHCOOHCH3 CH=CH2 H2 O2 HBr CH3 CH2 CH2 Br H2 O CH3 CH2 CH2 OH NaOH CH3 CH2 CHO Cu HCN CH3 CH2 CHCN OH H2 O H + CH3 CH2 CHCOOH OH