CH3OH CH MaBr+ 醚H2O H5 1 C HsMgBr CH=CHCOH 2 H, O CH CHCH=CHC-O 3 6-15 CH 1 C, HsMgBr 2 H2o CH CHCHC=O C25 CH3O CH3 MgBr H2 O + 醚 CH3 OH C O H2 O CH3 C6 H5 CH CH C6 H5 MgBr H2 O C2 H5 MgBr 1 2 1 2 C CH3 C6 H5 CH CH OH C6 H5 C O CH3 C6 H5 CHCH2 C2 H5