1,2,4-Trichlorobenzene → HCID 19756759, compound

HRID 1587990Notes

Reaction equation

HRID 1587990 reaction equation
[C:1]1([C:7]2[CH:12]=[CH:11][CH:10]=[C:9]([C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=3)[C:8]=2[OH:19])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Cl[C:21]1[CH:26]=[CH:25][C:24](Cl)=[CH:23][C:22]=1Cl.Cl[C:30]1[C:31](Cl)=[C:32](Cl)[CH:33]=[CH:34][CH:35]=1.[C:38]1(O)C=CC=CC=1>CS(O)(=O)=O>[C:13]1([C:9]2[CH:10]=[C:11]([CH:38]3[C:30]4[CH:31]=[CH:32][CH:33]=[CH:34][C:35]=4[C:22]4[C:21]3=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:12]=[C:7]([C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)[C:8]=2[OH:19])[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1

Participants

6

Reactant 4

HCID 131,2,4-TrichlorobenzeneHCID 996PhenolHCID 68951,2,3-TrichlorobenzeneHCID 755122,6-Diphenylphenol

Product 1

HCID 19756759HCID 19756759, compoundYield 90%

Reagents, catalysts & solvents 1

HCID 6395Methanesulfonic AcidSolvent

Procedure

In a 2 L, 3-necked round-bottomed flask equipped with a Vigreux column and a vacuum distillation setup was charged 9,9-DPHPF (75.0 g, 0.20 mol), 2,6-diphenylphenol (DPP; 295 g, 1.20 mol) and 1,2,4-trichlorobenzene (1 L). Methanesulfonic acid (250 mL) was then added and the resulting red suspension was stirred at room temperature. A vacuum was applied and the mixture was slowly heated up to 80° C. At this stage the trichlorobenzene started to reflux and phenol began to distill off. The vacuum distillation was continued for 48 hours and TLC then indicated that the reaction had reached equilibrium. The reaction mixture was cooled to room temperature and it separated into two phases. The top layer was diluted with chloroform (200 mL), neutralized with concentrated sodium carbonate solution and poured slowly into 6 L of petroleum ether. The resulting solids were collected on a filter funnel and the solids were then stirred with cyclohexane (500 mL) in a beaker for 30 min. After filtration, the washed solids weighed 125 g (95 %) and contained the desired bisphenol in about 90% yield by HPLC. The remainder was mainly the monotransalkylated phenol 9-(hydroxyphenyl), 9-(3,5-diphenyl-4-hydroxyphenyl)fluorene which was isolated in purified form in small quantities by flash chromatogarphy (20% ethyl acetate in hexanes) as white crystals: mp 144°-145° C.; 1H NMR 4.79 (br s, 1H, OH), 5.34 (s, 1H, OH), 6.70 (d, 2H, C2,6 -H on phenol), 7.13 (s, 2H, C3,5 -H on DPP), 7.15 (d, 2H, C3,5 -H), 7.25-7.50 (m, 16H, Ar-H), 7.75 (d, 2H, C4,5 -H on fluorene); MS (m/e, relative intensity %) 502 (M+., 10).

Workup

  1. customIn a 2 L, 3-necked round-bottomed flask equipped with a Vigreux column
  2. distillationa vacuum distillation setup
  3. temperaturethe mixture was slowly heated up to 80° C
  4. temperatureto reflux
  5. distillationto distill off
  6. distillationThe vacuum distillation
  7. temperatureThe reaction mixture was cooled to room temperature
  8. customit separated into two phases
  9. additionThe top layer was diluted with chloroform (200 mL)
  10. additionpoured slowly into 6 L of petroleum ether
  11. customThe resulting solids were collected on a filter funnel
  12. stirringthe solids were then stirred with cyclohexane (500 mL) in a beaker for 30 min
  13. filtrationAfter filtration

Sources & evidence

ORD record
ord-82fa337831a749669b5bca95ee86e8d9
Source dataset
uspto-grants-1993_06
Patent number
US05219978

Reaction notes

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