Triethylamine → [2-(4-Ethynylphenyl)-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

HRID 1452491Notes

Reaction equation

HRID 1452491 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:17]=[C:16]([NH:18][C:19]3[NH:20][N:21]=[C:22]([CH3:24])[CH:23]=3)[C:15]3[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=3)[N:9]=2)=[CH:4][CH:3]=1.C[Si]([C:29]#[CH:30])(C)C.C(N(CC)CC)C>CN(C=O)C.[Cu]I.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>[C:29]([C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:17]=[C:16]([NH:18][C:19]3[NH:20][N:21]=[C:22]([CH3:24])[CH:23]=3)[C:15]3[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=3)[N:9]=2)=[CH:4][CH:3]=1)#[CH:30]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 178418845[2-(4-bromo-phenyl)-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

Product 1

HCID 178435862[2-(4-Ethynylphenyl)-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amineYield 70%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

To a mixture of [2-(4-bromo-phenyl)-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine (III-34) (114 mg, 0.3 mmol), and trimethylsilylacetylene (147 mg, 1.5 mmol) in DMF (2 mL) was added CuI (1.1 mg, 1:50 mol %), Pd(PPh3)2Cl2 (4.2 mg, 1:50 mol %) and triethylamine (121 mg, 0.36 mmol). The resulting mixture was heated at 120° C. overnight and the solvent evaporated. The residue was triturated in ethyl acetate and the resulting precipitate collected by filtration. The collected solid was suspended in THF (3 mL) and TBAF (1M in THF, 1.leq) was added. The reaction mixture was stirred at room temperature for 2 hours and the solvent evaporated. The residue was purified by flash chromatography (silica gel, gradient of DCM:MeOH) to afford III-48 as a white solid (68 mg, 70%): 1H NMR (DMSO) δ 2.34 (3H, s), 4.36 (1H, s), 6.74 (1H, s), 7.55 (1H, m), 7.65 (2H, d), 7.84 (2H, m), 8.47 (2H, d), 8.65 (1H, d), 10.43 (1H, s), 12.24 (1H, s); MS 326.1 (M+H)+.

Workup

  1. customthe solvent evaporated
  2. customThe residue was triturated in ethyl acetate
  3. filtrationthe resulting precipitate collected by filtration
  4. additionTBAF (1M in THF, 1.leq) was added
  5. customthe solvent evaporated
  6. customThe residue was purified by flash chromatography (silica gel, gradient of DCM:MeOH)

Sources & evidence

ORD record
ord-997516e68e644e3f8ac8e75b80664796
Source dataset
uspto-grants-2009_01
Patent number
US07473691B2

Reaction notes

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