Potassium Carbonate → 1,4-Bis(5-phenyl-2-pyridyl)hexahydro-1,4-diazepine

HRID 460374Notes

Reaction equation

HRID 460374 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]([N:8]2[CH2:14][CH2:13][CH2:12][N:11]([C:15]3[CH:20]=[CH:19][C:18](Br)=[CH:17][N:16]=3)[CH2:10][CH2:9]2)=[N:6][CH:7]=1.[C:22]1(B(O)O)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.C(=O)([O-])[O-].[K+].[K+]>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>[C:22]1([C:2]2[CH:3]=[CH:4][C:5]([N:8]3[CH2:14][CH2:13][CH2:12][N:11]([C:15]4[CH:20]=[CH:19][C:18]([C:22]5[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=5)=[CH:17][N:16]=4)[CH2:10][CH2:9]3)=[N:6][CH:7]=2)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 66827Phenylboronic AcidHCID 129915931,4-Bis(5-bromo-2-pyridyl)hexahydro-1,4-diazepine

Product 1

HCID 102013941,4-Bis(5-phenyl-2-pyridyl)hexahydro-1,4-diazepine

Reagents, catalysts & solvents 1

HCID 178418397HCID 178418397, compoundCatalyst

Procedure

Under nitrogen, to a solution of the 1,4-bis(5-bromo-2-pyridyl)hexahydro-1,4-diazepine (200 mg, 0.585 mmol) synthesized in Reference Example 1 in ethanol-toluene (2.0 mL-2.0 mL) were added phenylboronic acid (130.0 mg, 1.07 mmol), tetrakis(triphenylphosphine)palladium (56.0 mg, 0.050 mmol) and a 2.0 M aqueous potassium carbonate (0.5 mL, 1.0 mmol), and the resulting mixture was stirred at 80° C. for 3 hours. After cooling, the organic layer was collected and the aqueous layer was extracted with chloroform. The organic layers were combined, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield crude crystals. The crude crystals were recrystallized from chloroform-hexane to yield the title compound as slightly yellow needles (melting point: 221.0–222.0° C.) (61.0 mg, yield: 31%).

Workup

  1. temperatureAfter cooling
  2. customthe organic layer was collected
  3. extractionthe aqueous layer was extracted with chloroform
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by column chromatography on silica gel
  7. customto yield crude crystals
  8. customThe crude crystals were recrystallized from chloroform-hexane

Sources & evidence

ORD record
ord-a0d5d1cef3eb4e1392a20d9dbe14e547
Source dataset
uspto-grants-2007_03
Patent number
US07196101B2

Reaction notes

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