Triethylamine → Tert-butyl 4-[2-(4-(2-phenylethenyl)-3-pyridyl)ethynyl]benzoate

HRID 1106834Notes

Reaction equation

HRID 1106834 reaction equation
Br[C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[CH:8]=[CH:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.[C:16]([C:18]1[CH:30]=[CH:29][C:21]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])=[CH:20][CH:19]=1)#[CH:17].C(N(CC)CC)C>CN(C=O)C.[Cu](I)(I)I>[C:10]1([CH:9]=[CH:8][C:7]2[CH:6]=[CH:5][N:4]=[CH:3][C:2]=2[C:17]#[C:16][C:18]2[CH:30]=[CH:29][C:21]([C:22]([O:24][C:25]([CH3:26])([CH3:28])[CH3:27])=[O:23])=[CH:20][CH:19]=2)[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 13965008Tert-butyl 4-ethynylbenzoateHCID 539315873-Bromo-4-(2-phenylethenyl)pyridine

Product 1

HCID 54016878Tert-butyl 4-[2-(4-(2-phenylethenyl)-3-pyridyl)ethynyl]benzoateYield 33%

Reagents, catalysts & solvents 2

HCID 178506583HCID 178506583, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
95 °C

Procedure

3-Bromo-4-(2-phenylethenyl)pyridine (0.74 g, 2.9 mmol) was dissolved in DMF (1.4 ml). The solution was treated with tert-butyl 4-ethynylbenzoate (0.93 g, 4.6 mmol), copper (III) iodide (0.023 g, 0.21 mmol) and triethylamine (0.64 g, 6.3 mmol). The reaction mixture was degassed by bubbling through argon and the catalyst, bistriphenyl phosphinepalladium dichloride (0.03 g, 0.043 mmol), was added. The reaction was heated to 90-100° C. for 3 hours and then partitioned between ethyl acetate and water. The organic layer was washed with water (3×), dried (MgSO4) and evaporated. The residue was purified by chromatography (eluting with ethylacetate/hexane) to give tert-butyl 4-[2-(4-(2-phenylethenyl)-3-pyridyl)ethynyl]benzoate as a dark oil (0.36 g, 33%).

Workup

  1. customThe reaction mixture was degassed
  2. customby bubbling through argon
  3. additionthe catalyst, bistriphenyl phosphinepalladium dichloride (0.03 g, 0.043 mmol), was added
  4. custompartitioned between ethyl acetate and water
  5. washThe organic layer was washed with water (3×)
  6. dry with materialdried (MgSO4)
  7. customevaporated
  8. customThe residue was purified by chromatography (eluting with ethylacetate/hexane)

Sources & evidence

ORD record
ord-75a8a525e6174f8c9d0c05e1e0adb425
Source dataset
uspto-grants-2000_05
Patent number
US06057345

Reaction notes

Loading…