H3 6. CH3CI 0-20℃ 7. KMnO4 HOOC—(CH2)4COOH CH3 hv CH2CI 8. + C H 3 C l A l C l 3 0 ~ 2 0 ℃ + KM n O 4 C H 3 + C l 2 h v 6. 7. 8. CH3 CH2 C l H O O C ( C H 2 ) 4 C O O H