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Phenol → 4,4'-Dihydroxy-alpha-methylstilbene

HRID 6310
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HRID 6310 반응식
[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Cl[CH2:9][C:10](=[O:12])[CH3:11].ClC(Cl)C(C)=O.O=[C:20]([CH:22]=[C:23]([CH3:25])[CH3:24])[CH3:21].S(=O)(=O)(O)O>O.CC(C)=O.C(Cl)Cl>[OH:7][C:1]1[CH:6]=[CH:5][C:4]([C:20]([CH3:21])=[CH:22][C:23]2[CH:25]=[CH:11][C:10]([OH:12])=[CH:9][CH:24]=2)=[CH:3][CH:2]=1
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참가 물질

9

반응물 5

HCID 996PhenolHCID 1118Sulfuric AcidHCID 6571Chloroacetone3회HCID 8858Mesityl oxideHCID 105671,1-Dichloroacetone

생성물 1

HCID 6566934,4'-Dihydroxy-alpha-methylstilbene

시약·촉매·용매 3

HCID 180
Acetone
용매
HCID 962Water용매3회
HCID 6344Dichloromethane용매

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온도
-10 °C

실험 절차

Phenol (752.8 grams, 8.0 moles), chloroacetone (384.77 grams, 4.0 moles as chloroacetone) and methylene chloride (600 grams) are added to a reactor and cooled to -10° C. with stirring under a nitrogen atmosphere. The chloroacetone used is a commercial grade containing 96.25% chloroacetone, 0.05% acetone, 3.05% 1,1-dichloroacetone and 0.60% mesityl oxide. Concentrated sulfuric acid (392.32 grams, 4.0 moles) is added dropwise to the stirred solution over a forty minute period and so as to maintain the reaction temperature between -11° C. and -9° C. After 150 minutes of post reaction between a -11° C. to -9° C. temperature range, the viscous, orange colored oil product is mixed with iced deionized water (1000 milliliters). The oil product is separated then washed with a second portion (1000 milliliters) and then a third portion (1000 milliliters) of deionized water. After separation, the recovered oil product is added to a pair of 2 liter beakers along with ethanol (250 milliliters) and stirred to provide solutions. Deionized water (250 milliliters) is added to the stirred solutions and heating commences. As the temperature of the mixture increases, the stirred mixture begins to clear. Each time clearing is observed, sufficient deionized water is added to induce cloudiness, followed by continuation of the mixing and heating. Once the temperature reaches 90° C., a massive precipitation of white crystalline plates occurs and is followed by immediate coalesence of the precipitated product to an oil. The oil layer is recovered by decantation of the water layer and ethanol (250 milliliters) is added. Deionized water is again added to the stirred solutions as heating commences, in an amount sufficient to induce cloudiness each time clearing is observed. Once the temperature reaches 70° C., a massive precipitation of white crystalline plates again occurs. At this time, stirring is stopped, sufficient deionized water is added to fill both of the beakers and the crystalline slurries are chilled to 4° C. and held therein for 16 hours. The crystalline product is recovered by filtration of the chilled crystalline slurries, added to a beaker along with deionized water (1000 milliliters), then stirred with heating to 100° C. After maintaining the stirred slurry at 100° C. for thirty minutes, the crystalline product is recovered by filtration then again combined with deionized water (1000 milliliters) and stirred with heating to 100° C. The crystalline product is recovered by filtration then dried in a vacuum oven at 1000° C. and 5 mm Hg to a constant weight of 478.8 grams. Proton magnetic resonance spectroscopy and infrared spectrophotometric analysis confirm the product structure.

후처리

  1. temperatureso as to maintain the reaction temperature between -11° C. and -9° C
  2. customAfter 150 minutes of post reaction between a -11° C. to -9° C. temperature range
  3. customThe oil product is separated
  4. washthen washed with a second portion (1000 milliliters)
  5. customAfter separation
  6. additionthe recovered oil product is added to a pair of 2 liter beakers along with ethanol (250 milliliters)
  7. stirringstirred
  8. customto provide solutions
  9. temperatureheating commences
  10. temperatureAs the temperature of the mixture increases
  11. temperatureheating
  12. customreaches 90° C.
  13. customa massive precipitation of white crystalline plates
  14. customThe oil layer is recovered by decantation of the water layer and ethanol (250 milliliters)
  15. additionis added
  16. additionDeionized water is again added to the stirred solutions
  17. temperatureas heating commences
  18. customreaches 70° C.
  19. customa massive precipitation of white crystalline plates
  20. stirringAt this time, stirring
  21. additionsufficient deionized water is added
  22. temperaturethe crystalline slurries are chilled to 4° C.
  23. filtrationThe crystalline product is recovered by filtration of the chilled crystalline slurries
  24. additionadded to a beaker along with deionized water (1000 milliliters)
  25. stirringstirred
  26. temperaturewith heating to 100° C
  27. temperatureAfter maintaining the stirred slurry at 100° C. for thirty minutes
  28. filtrationthe crystalline product is recovered by filtration
  29. stirringstirred
  30. temperaturewith heating to 100° C
  31. filtrationThe crystalline product is recovered by filtration
  32. customthen dried in a vacuum oven at 1000° C.

출처 및 근거

ORD 기록
ord-0ee36df9d1a4484bb5c2bc1ce082fa65
출처 데이터셋
uspto-grants-1993_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05248360

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