4.完成下列反应 CHO 1) ① 浓NBOH① CHO (2) 稀NaOH L⊥AIH CHaCHCHO △ (ajo (3) b)NHe⑤稀NaOH AlC t CHrCH,CH,COCl Zn/Hg HCl COOH CH,OR CH =C(CH3 CHO CH ==C(CH3)CH,OH 解:①O ④ CH3 CH CoCHbCH (CH23CH ⑤ CHO CHo:⑥ CHO