1 C6HSMgBr CH CHCH CC(CH 6·5 3/3 c。HcH= CHCC(CH) 6-5 1 C2HgMg Br 2 HO C HCHCH CC(CH 3/3 CH 2-·5 1 CH MgBr -0.05molCuBr 2H,0C O H2 O C6 H5 CH CH C6 H5 MgBr H2 O C2 H5 MgBr C(CH3 ) 3 1 2 1 2 C O C6 H5 CHCH2 C(CH3 ) 3 C6 H5 C O C6 H5 CHCH2 C2 H5 C(CH3 ) 3 O CH3 MgBr H2 O 1 2 ~0.05molCuBr O CH3