Triphenylphosphine → 11-Bromoundecylmaleimide pentacene

HRID 251754Notes

Reaction equation

HRID 251754 reaction equation
[CH:1]1[C:22]2[C:5](=[CH:6][C:7]3[C:20]([CH:21]=2)=[CH:19][C:18]2[C:9](=[CH:10][C:11]4[C:16]([CH:17]=2)=[CH:15][CH:14]=[CH:13][CH:12]=4)[CH:8]=3)[CH:4]=[CH:3][CH:2]=1.[C:23]1(=[O:29])[NH:27][C:26](=[O:28])[CH:25]=[CH:24]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60]O.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O1CCCC1>[Br:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][C:24]1[C:23]([NH:27][C:26](=[O:28])[CH:25]=1)=[O:29].[CH:4]1[C:5]2[C:22](=[CH:21][C:20]3[C:7]([CH:6]=2)=[CH:8][C:9]2[C:18](=[CH:17][C:16]4[C:11]([CH:10]=2)=[CH:12][CH:13]=[CH:14][CH:15]=4)[CH:19]=3)[CH:1]=[CH:2][CH:3]=1.[Br:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][N:27]1[C:26](=[O:28])[CH:25]=[CH:24][C:23]1=[O:29].[CH:4]1[C:5]2[C:22](=[CH:21][C:20]3[C:7]([CH:6]=2)=[CH:8][C:9]2[C:18](=[CH:17][C:16]4[C:11]([CH:10]=2)=[CH:12][CH:13]=[CH:14][CH:15]=4)[CH:19]=3)[CH:1]=[CH:2][CH:3]=1

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 7416311-Bromo-1-undecanolHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 86643198Pentacene maleimide

Product 2

HCID 8664775211-Bromoundecylmaleimide pentaceneHCID 86647754N-(11-bromoundecyl) maleimide pentacene

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Pentacene-maleimide adduct (5c) (375 mg, 1 mmole) are added to a solution of triphenyl phosphine (393 mg, 1.5 mmole) and 11-bromo-1-undecanol (375 mg, 1.5 mmole) in 40 mL of anhydrous tetrahydrofuran. To this mixture a solution of diisopropyl azodicarboxylate (300 mg, 1.5 mmole) in 1.0 mL of anhydrous THF is added dropwise under a stream of nitrogen. After completion of the addition, the solution is stirred at room temperature for 18 hours. The solvent is evaporated under reduced pressure and the residue is titrated with diethyl ether and the precipitate is filtered, washed with 1:1 ether-hexane and dried. Crystallization from benzene affords the pure sample of 11-bromoundecylmaleimide-pentacene adduct 5d.

Workup

  1. additionAfter completion of the addition
  2. customThe solvent is evaporated under reduced pressure
  3. filtrationthe precipitate is filtered
  4. washwashed with 1:1 ether-hexane
  5. customdried
  6. customCrystallization from benzene

Sources & evidence

ORD record
ord-375257fa85024251a427f14ca938deb1
Source dataset
uspto-grants-2011_01
Patent number
US07867469B2

Reaction notes

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