活性:酮<醛 Ba(oh2 CH3C H2C-C-CH3 CH3 H CH 3 2或H3PO4 H3C-C-CH2-C-CH3 OH CH Ha C-C=cH-C-CH2% CHO H2o OHC(CH2)3-CH-CHO 115℃C C3H7 620 C3H7活性：酮<醛 CHO C3 H7 115℃ H2 O OHC (CH2) 3 CH CHO C3 H7 CH C CH3 O H3 C C CH3 I 2或H3 PO4 CH2 C CH3 O H3 C C CH3 OH Ba(OH) 2 H2 C C CH3 O H CH3 C + CH3 O 62% 71%