解:(1) Br2 BrCH2 CH2 CHC2H5 (2) + HBr CH3CH2CHC2H5 H CH3 3 4)L-CH=CHi MO +CO, COOH (5) CH3 HBr - HOCH, CHCH B CH H3 Hso OSO3H OHC一CH2CH2CH一CHo H,O H;C CH 3