答案(1-4): MeO2C MeO2c MeO2C H CH3 C6H5 CH3 CO2H O2H CH3 CH20℃ CH3 CH3 (2) RMgX R R(4) O △ (5) O △ (6) O △ 答案（1-4）： Ph Ph Ph Ph H H Ph H Ph Ph Ph H HH H MeO2C MeO2C Cl ClH H MeO2C MeO2C Cl Cl △ ++ △ △ H H Cl Cl Cl Cl △ 1. (1) (2) (3) H (1) C6H5 CH3 △ C6H5 CH3 (2) △ H H (3) △ CO2H CO2H CO2H CO2H 2. 3. (1) 10℃ 20℃ CH3 CH3 CH3 CH3 CH3 CH3 (2) H3C CH3 9℃ CH3 CH3 40℃ CH3 CH3 (3) Br Br RMgX R R △ R R