Potassium Carbonate → Diethyl 2,2''-dimethyl[1,1';4',1'']terphenyl-2',5'-dicarboxylate

HRID 1618343Notes

Reaction equation

HRID 1618343 reaction equation
Br[C:2]1[C:3](Br)=[C:4]([CH:10]=[CH:11][C:12]=1[C:13]([O:15][CH2:16][CH3:17])=[O:14])[C:5]([O:7][CH2:8][CH3:9])=[O:6].[C:19]1([CH3:28])[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1B(O)O.C([O-])([O-])=O.[K+].[K+]>C1(C)C=CC=CC=1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:28][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[C:2]1[C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:11][C:10]([C:3]2[CH:2]=[CH:12][CH:11]=[CH:10][C:4]=2[CH3:5])=[C:4]([C:5]([O:7][CH2:8][CH3:9])=[O:6])[CH:3]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 27332672-Methylphenyl boronic acidHCID 66645638Diethyl dibromoterephthalate

Product 1

HCID 58232266Diethyl 2,2''-dimethyl[1,1';4',1'']terphenyl-2',5'-dicarboxylate

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 1140TolueneSolvent

Procedure

60 g (160 mmol) of diethyl dibromoterephthalate, 43 g (320 mmol) of o-tolylboronic acid, 365 mg (0.32 mmol) of Pd(PPh3)4 and 92 g (660 mmol) of K2CO3 are heated at the boil for 4 h in 300 ml of toluene and 300 ml of water. The mixture is subsequently partitioned between toluene and water, and the organic phase is washed three times with water and dried over Na2SO4. The residue remaining is recrystallised twice from heptane to give colourless crystals. The yield is 51 g (127 mmol, 81%).

Workup

  1. customThe mixture is subsequently partitioned between toluene and water
  2. washthe organic phase is washed three times with water
  3. dry with materialdried over Na2SO4
  4. customThe residue remaining is recrystallised twice from heptane
  5. customto give colourless crystals

Sources & evidence

ORD record
ord-9dbfa2f8e87f47028affc398834118b8
Source dataset
uspto-grants-2014_07
Patent number
US08766001B2

Reaction notes

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