Quinone → 6,13-Pentacenequinone

HRID 1895564

Reaction equation

HRID 1895564 reaction equation
Br[CH:2](Br)[C:3]1[C:4]([CH:9](Br)Br)=[CH:5][CH:6]=[CH:7][CH:8]=1.[C:13]1(=[O:20])[CH:18]=[CH:17][C:16](=[O:19])[CH:15]=[CH:14]1.[I-].[Na+]>CN(C=O)C>[CH:5]1[C:4]2[C:3](=[CH:2][C:18]3[C:13](=[O:20])[C:14]4[C:15]([C:16](=[O:19])[C:17]=3[CH:9]=2)=[CH:9][C:4]2[C:3](=[CH:8][CH:7]=[CH:6][CH:5]=2)[CH:2]=4)[CH:8]=[CH:7][CH:6]=1

Participants

5

Reactant 3

HCID 4650QuinoneHCID 5238Sodium IodideHCID 832341,2-Bis(dibromomethyl)benzene

Product 1

HCID 764156,13-PentacenequinoneYield 91%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

To a clear solution of α,α,α′,α′-tetrabromo-o-xylene (30.5 g, 0.073 mol) in DMF (100 mL) was added benzoquinone (3.125 g, 0.03 mol) and sodium iodide (27.25 g, 0.18 mol). The resulting brown suspension was heated and stirred at 120° C. overnight. After cooling to RT, the yellow solids were filtered via vacuum filtration. The yellow solids were washed with water, saturated sodium bisulfite solution and dried to yield the product (8.1 g, 91%). 1H NMR (500 MHz, CDCl3): δ 8.96 (s, 4H), 8.14 (m, 4H), 7.72 (m, 4H). 13C NMR (125.68 MHz, CDCl3): δ 183.2, 135.47, 130.80, 130.30, 129.98, 129.66. m/z: 308 [M+].

Workup

  1. temperatureThe resulting brown suspension was heated
  2. temperatureAfter cooling to RT
  3. filtrationthe yellow solids were filtered via vacuum filtration
  4. washThe yellow solids were washed with water, saturated sodium bisulfite solution
  5. customdried

Sources & evidence

ORD record
ord-dd94acd8cb7347b59690211fdb09a179
Source dataset
uspto-grants-2013_08
Patent number
US08513466B2

Linked notes

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