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1-methyl-2-(tributylstannyl)-1H-pyrrole → 7-fluoro-5-methyl-2-(1-methyl-1H-pyrrol-2-yl)-6-phenyl-1,3-benzoxazole-4-carbonitrile

HRID 17435
Notes
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Reaction equation

HRID 17435 reaction equation
C([Sn]([C:14]1[N:15]([CH3:19])[CH:16]=[CH:17][CH:18]=1)(CCCC)CCCC)CCC.C(C1(C)C(O)=C(C(C)(C)C)C=CC1)(C)(C)C.Cl[C:37]1[O:38][C:39]2[C:40](=[C:42]([C:54]#[N:55])[C:43]([CH3:53])=[C:44]([C:47]3[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=3)[C:45]=2[F:46])[N:41]=1>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C1(C)C=CC=CC=1>[F:46][C:45]1[C:44]([C:47]2[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=2)=[C:43]([CH3:53])[C:42]([C:54]#[N:55])=[C:40]2[C:39]=1[O:38][C:37]([C:14]1[N:15]([CH3:19])[CH:16]=[CH:17][CH:18]=1)=[N:41]2
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 27693971-methyl-2-(tributylstannyl)-1H-pyrroleHCID 510414292-Chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrileHCID 666371922,6-Di-t-butylcresol

Product 1

HCID 510399657-fluoro-5-methyl-2-(1-methyl-1H-pyrrol-2-yl)-6-phenyl-1,3-benzoxazole-4-carbonitrile

Reagents, catalysts & solvents 2

HCID 178418476
HCID 178418476, compound
Catalyst
HCID 1140TolueneSolvent

Procedure

Tributylstannyl-1-methylpyrrole (389 mg, 1.05 mmol), bis(triphenylphosphine)palladium(II) dichloride (49 mg, 0.07 mmol), and a catalytic amount of 2,6-di-tert-butylcresol (2 mg) were added to a toluene (20 ml) solution of 2-chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-cabonitrile (I-130) (200 mg, 0.70 mol), followed by stirring under heat under nitrogen atmosphere for 3 hours. After cooling, the reaction liquid was filtered, and the solvent of the filtrate was evaporate away under reduced pressure. The resulting residue was subjected to silica gel column chromatography, and eluted with a mixed solvent of n-hexane/ethyl acetate (9:1, v/v→5:1, v/v) to obtain a main product. After washing with isopropyl ether, the entitled compound (50 mg, 22%) was collected by filtration as a pale yellow solid.

Workup

  1. temperatureunder heat under nitrogen atmosphere for 3 hours
  2. temperatureAfter cooling
  3. customthe reaction liquid
  4. filtrationwas filtered
  5. customthe solvent of the filtrate was evaporate away under reduced pressure
  6. washeluted with a mixed solvent of n-hexane/ethyl acetate (9:1, v/v→5
  7. custom1, v/v) to obtain a main product
  8. washAfter washing with isopropyl ether
  9. filtrationthe entitled compound (50 mg, 22%) was collected by filtration as a pale yellow solid

Sources & evidence

ORD record
ord-2d23f605678b474eaf1831fc88ee31f9
Source dataset
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07737166B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes