??????????? -OH ???????? aromatic ?????? - PowerPoint PPT Presentation

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??????????? -OH ???????? aromatic ??????

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??????????? -OH ???????? aromatic ??????. ????????????????? -X ???????? ... 'Bakelite' 403221-phenol-arylhalide. 22. 4.8 ??????? phthalein dye. phenolphthalein ... – PowerPoint PPT presentation

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Title: ??????????? -OH ???????? aromatic ??????


1
403221 ????????????????? ??????????????
  • ??. ??. ??????? ???????
  • ??????????? ??????????????
  • ??????????????????????

2
?????????
  • ??????????? -OH ???????? aromatic ??????
  • ????????????????? -X ???????? aromatic ??????

3
  • ????????????????? phenol ???????????????

4
???????????????????????
  • ?????
  • ???????? 182oC
  • ??????????? 43oC
  • ???????? 9 ????/100 mL ???
  • ?????????????????????????????
  • ?????????????????????

5
  • ??????????????????????????
  • ????????????????

6
??????????????
  • 1. Hydrolysis ??? aryl halides

Aryl halide ????????????????????????????????? e-
(strong e- withdrawing)
7
  • 2. Alkali fusion ???????????? sulfonates

8
  • 3. ????????? cumene (isopropylbenzene)

9
  • 4. Hydrolysis ??? diazonium salts

Diazonium salt ????????? aniline
10
?????????????????
  • 1. ??????????????????????????
  • ????????????????

11
  • Phenol ????????????????????????????? ?????
    phenolate ion ?? resonance ???????????

12
  • Phenol ???????????? e- ????????????????????
    Phenol ???????????? e-
  • ????????????????????????

13
(No Transcript)
14
(No Transcript)
15
  • 2. Ether formation (Williamson synthesis)

16
  • 3. Ester formation

17
(No Transcript)
18
  • 4. Ring substitution Electrophilic aromatic
    substitution
  • -OH activating group o-, p- director
  • 4.1 bromination

4.2 nitration
19
  • 4.3 sulfonation

4.4 Kolbe reaction (OCO) ????????? phenolic
acid
20
  • 4.5 Reimer-Tiemann reaction
  • ????????? phenolic aldehyde

4.6 Coupling ??? diazonium salt ?????? azo dye
21
  • 4.7 ???????????? formaldehyde

phenol-formaldehyde resin Bakelite
22
  • 4.8 ??????? phthalein dye

phenolphthalein
23
fluorescein
24
  • 5. ??????????? phenol
  • 5.1 phenol ??????????????
  • -??????????????? Na2CO3, NaOH
  • -?????????????????? NaHCO3
  • 5.2 phenol ????????????????????????????, ????,
  • ??? ??????????? FeCl3

25
???????????????????????
  • Aryl halide ????????????? nucleophilic
    substitution ??????? alkyl halide ??????????
    resonance ??????
  • ????? C-X ??? Aryl halide ????????????????????????
    ???????????????????? C-X ??? Alkyl halide

26
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27
  • ????????? nucleophilic aromatic substitution
    (SNAr)
  • aryl halide ?????????????????????? ???? -NO2,
    -NO, -CN ?????????? ortho-, para- ??????? -X
    ??????????????????????? Nucleophile ???

28
(No Transcript)
29
  • ????????????? nucleophilic aromatic substitution
    (SNAr)
  • ??? addition-elimination

1.
2.
30
  • Resonance form ??? carbanion ????? carbanion
    ?????????????

31
  • -aryl halide ?????????????????????????
    ??????????????????????? Nucleophile ????????
    strong base ???? NH2-
  • -???????????????????????? elimination-addition

32
  • ????????????? nucleophilic aromatic substitution
  • ??? elimination-addition Benzyne

1.
2.
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