Triethylamine → Methyl 4-oxo-4-[[5-(2-trimethylsilylethynyl)-2-pyridyl]amino]butanoate

HRID 525996노트

반응식

HRID 525996 반응식
Br[C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:16])[CH2:10][CH2:11][C:12]([O:14][CH3:15])=[O:13])=[N:6][CH:7]=1.C(N(CC)CC)C.[C:24]([Si:26]([CH3:29])([CH3:28])[CH3:27])#[CH:25]>O1CCCC1.[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Cu]I>[O:16]=[C:9]([NH:8][C:5]1[CH:4]=[CH:3][C:2]([C:25]#[C:24][Si:26]([CH3:29])([CH3:28])[CH3:27])=[CH:7][N:6]=1)[CH2:10][CH2:11][C:12]([O:14][CH3:15])=[O:13]

참가 물질

7

반응물 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 1506825Methyl 4-[(5-bromopyridin-2-yl)amino]-4-oxobutanoate

생성물 1

HCID 89444199Methyl 4-oxo-4-[[5-(2-trimethylsilylethynyl)-2-pyridyl]amino]butanoate수율 10%

시약·촉매·용매 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)촉매HCID 6102075Dichlorobis(triphenylphosphine)palladium촉매HCID 8028Tetrahydrofuran용매

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온도
65 °C

실험 절차

To a solution of methyl 4-[(5-bromo-2-pyridyl)amino]-4-oxo-butanoate (commercially available: 0.25 g, 0.871 mmol) in tetrahydrofuran was added bis(triphenylphosphine) palladium(II) dichloride (61.7536 mg, 0.087 mmol), copper(I) iodide (16.6 mg, 0.087 mmol), triethylamine (889 mg, 1.23 mL, 8.70 mmol) and ethynyltrimethylsilane (130 mg, 0.19 mL, 1.30 mmol). The reaction mixture was stirred at 65° C. overnight. The reaction was stopped and the solution was partitioned between ethyl acetate and water. The aqueous layer was separated and extracted with ethyl acetate (2×). The combined organic layer was dried on magnesium sulfate and concentrated under vacuum. The residue was purified by flash chromatography eluting with cyclohexane-ethyl acetate (3/1) to give methyl 4-oxo-4-[[5-(2-trimethylsilylethynyl)-2-pyridyl]amino]butanoate (26 mg, 10% yield). 1H NMR (400 MHz, CDCl3) 8.39 (s, 1H), 8.14 (m, 2H), 7.74 (d, 1H), 3.72 (s, 3H), 2.74 (m, 4H), 0.24 (s, 9H) ppm.

후처리

  1. customthe solution was partitioned between ethyl acetate and water
  2. customThe aqueous layer was separated
  3. extractionextracted with ethyl acetate (2×)
  4. customThe combined organic layer was dried on magnesium sulfate
  5. concentrationconcentrated under vacuum
  6. customThe residue was purified by flash chromatography
  7. washeluting with cyclohexane-ethyl acetate (3/1)

출처 및 근거

ORD 기록
ord-423cd86b31384ec0b4e020671233f45a
출처 데이터셋
uspto-grants-2016_05
특허 번호
US09345244B2

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