2,6-Lutidine → (E)-(2-bromomethyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene)acetonitrile

HRID 452175Notes

Reaction equation

HRID 452175 reaction equation
C(C1N([CH2:14][C:15]2[CH:32]=[CH:31][C:18]3/[C:19](=[CH:28]/[C:29]#[N:30])/[C:20]4[CH:27]=[CH:26][CH:25]=[CH:24][C:21]=4[CH2:22][CH2:23][C:17]=3[CH:16]=2)C2=NC(C)=CC(C)=C2N=1)C.N1C(C)=CC=CC=1C.[Br-:41].[Li+].CS(OS(C)(=O)=O)(=O)=O>C1COCC1.CCCCCC.C(OCC)(=O)C>[Br:41][CH2:14][C:15]1[CH:32]=[CH:31][C:18]2/[C:19](=[CH:28]/[C:29]#[N:30])/[C:20]3[CH:27]=[CH:26][CH:25]=[CH:24][C:21]=3[CH2:22][CH2:23][C:17]=2[CH:16]=1

Participants

8

Reactant 4

HCID 79372,6-LutidineHCID 81560Methanesulfonic anhydrideHCID 82050Lithium BromideHCID 22858094(E)-[2-(2-ethyl-5,7-dimethyl-3H-imidazo[4,5-b]pyridin-3-yl)methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene]acetonitrile

Product 1

HCID 67210773(E)-(2-bromomethyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene)acetonitrileYield 74%

Reagents, catalysts & solvents 3

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolventHCID 8857Ethyl AcetateSolvent2×

Procedure

(E)-(2-Hydroxymethyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene)acetonitrile (JP-B-2526005; 10.00 g, 38.3 mmol) was dissolved in THF (380 mL), 2,6-lutidine (26.7 mL, 230 mmol), lithium bromide (19.94 g, 230 mmol) and methanesulfonic anhydride (16.67 g, 95.7 mmol) were added, and the mixture was stirred at room temperature for 16 hr. Ethyl acetate was added to the mixture, and the organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give a residue. Ethyl acetate (10 mL) and hexane (5 mL) were added to the residue, and the mixture was filtered to give the title compound (9.18 g, 74%).

Workup

  1. washthe organic layer was washed with brine
  2. dry with materialdried over anhydrous magnesium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customto give a residue
  5. filtrationthe mixture was filtered

Sources & evidence

ORD record
ord-ff35be1435ca45c3a63c7de1e1038fba
Source dataset
uspto-grants-2013_07
Patent number
US08486980B2

Reaction notes

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