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

HRID 22451
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HRID 22451 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].Cl[CH:14](Cl)[C:15]([CH3:17])=O.Cl[CH2:20][C:21]([CH2:23]Cl)=O.S(=O)(=O)(O)O>O.CC(C)=O.C(Cl)Cl>[OH:7][C:1]1[CH:6]=[CH:5][C:4]([C:15]([CH3:17])=[CH:14][C:21]2[CH:23]=[CH:11][C:10]([OH:12])=[CH:9][CH:20]=2)=[CH:3][CH:2]=1
참가 물질반응 조건실험 절차후처리출처 및 근거반응 노트

참가 물질

9

반응물 5

HCID 996PhenolHCID 1118Sulfuric AcidHCID 6571Chloroacetone3회HCID 105671,1-DichloroacetoneHCID 107931,3-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 (376.44 grams, 4.0 moles), chloroacetone (205.62 grams, 2.0 moles as chloroacetone) and methylene chloride (300 grams) are added to a reactor and cooled to -10° C. with stirring. The chloroacetone used is a technical grade containing 90% chloroacetone, 2.5% acetone, 6.5% 1,1-dichloroacetone and 1.0% 1,3-dichloroacetone. Concentrated sulfuric acid (196.16 grams, 2.0 mole) is added dropwise to the stirred solution over a one hour period and so as so maintain the reaction temperature at -10° C. After two hours of post reaction at the -10° C. temperature, the viscous orange oil solution is mixed with 500 milliliters of iced deionized water. The oil solution is separated then washed with a second 500 milliliter portion of iced deionized water. After separation, the recovered oil solution is added to a 2 liter beaker along with 250 milliliters of ethanol and stirred to provide a solution. Deionized water (250 milliliters) is added to the stirred solution and heating commenced. As the temperature of the mixture increased, the stirred mixture began 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 reached 70° C., a massive precipitation of white crystalline plates occurred 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 250 milliliters of ethanol is added. Deionized water is again added to the stirred solution as heating commenced, in an amount sufficient to induce cloudiness each time clearing is observed. Once the temperature reached 90° C., a massive precipitation of white crystalline plates again occurred. At this time, stirring is stopped and the crystalline slurry, as well as the decanted water layer are both chilled to 5° C. and held therein for 12 hours. The crystalline product is recovered by filtration then combined with 250 milliliters of deionized water then stirred with heating to 90° C. After cooling to 5° C., the crystalline product is recovered by filtration then dried in a vacuum oven at 100° C. and 5 mm Hg to a constant weight of 243.3 grams. Proton magnetic resonance spectroscopy and infrared spectrophotometric analysis confirmed the product structure.

후처리

  1. temperatureso as so maintain the reaction temperature at -10° C
  2. customAfter two hours of post reaction at the -10° C. temperature
  3. customThe oil solution is separated
  4. washthen washed with a second 500 milliliter portion of iced deionized water
  5. customAfter separation
  6. additionthe recovered oil solution is added to a 2 liter beaker along with 250 milliliters of ethanol
  7. stirringstirred
  8. customto provide a solution
  9. temperatureheating
  10. temperatureAs the temperature of the mixture increased
  11. temperatureheating
  12. customreached 70° C.
  13. customa massive precipitation of white crystalline plates
  14. customThe oil layer is recovered by decantation of the water layer and 250 milliliters of ethanol
  15. additionis added
  16. additionDeionized water is again added to the stirred solution
  17. temperatureas heating
  18. customreached 90° C.
  19. customa massive precipitation of white crystalline plates
  20. stirringAt this time, stirring
  21. temperatureboth chilled to 5° C.
  22. filtrationThe crystalline product is recovered by filtration
  23. stirringthen stirred
  24. temperaturewith heating to 90° C
  25. temperatureAfter cooling to 5° C.
  26. filtrationthe crystalline product is recovered by filtration
  27. customthen dried in a vacuum oven at 100° C.

출처 및 근거

ORD 기록
ord-4e7643cfabb346c8b456d0fac05596fc
출처 데이터셋
uspto-grants-1995_06
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05428125

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