NHHN3RCH=NH3RCHO+3NH3RR不稳定H6HCHO+ 4NH36H20乌洛托品
3RCHO + 3NH3 3RCH NH HN N NH H 不稳定 R R 6HCHO + 4NH3 乌洛托品 + 6H2 O N N N N
2reaction with secondaryamineenamineCH3CHO + CHN-PhCH-N十H20PhH烯胺87%酸H20+H0CR0H20RCCIHCICRCHH
② reaction with secondary amine——enamine CHO + CH3N Ph H CH N CH3 Ph + H2O 烯胺 87% O + N O H 酸 O N + H2O N O + RCCl O N O CRCl O H2O O CR O + N O H HCl
11.3.1.7 Wittig's reactionC=CHRO-PPh3+C=0+CH=PPh31RWittig试剂
11.3.1.7 Wittig’s reaction C O + CH R PPh3 C CHR + O=PPh3 Wittig 试剂
-BPh3PCHR XPh3P+RCHX11R'R'→ PhsP=CH + CeH + LiBrPh3P-CH,Br+PhLi-PhC=0+CH2-PPh3→Ph2CPPh3→Ph2C=CHz+0=PPh3-CH2Ph
Ph3 P CH3 Br + PhLi Ph3 P CH2 + C6 H6 + LiBr C O Ph Ph + CH2 PPh3 Ph2C CH2 O - PPh3 Ph2C CH2 +O PPh3 Ph3 P + RCHX R' Ph3 PCHR R' + X -
COORCHORONaPh3PCH2+BrPh3P=0COORLiAIHCH2OH维生素A
+ Ph3 PCH2 COOR Br - RONa Ph3 P O LiAlH4 CHO COOR CH2OH 维生素A