Ethynylpyridine → 4-Nitro-2-(pyridin-2-ylethynyl)aniline

HRID 503372

反応式

HRID 503372 の反応式
I[C:2]1[CH:8]=[C:7]([N+:9]([O-:11])=[O:10])[CH:6]=[CH:5][C:3]=1[NH2:4].[C:12]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=1)#[CH:13]>CN(C=O)C.CCN(CC)CC.O.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.[Cu]I>[N+:9]([C:7]1[CH:6]=[CH:5][C:3]([NH2:4])=[C:2]([C:13]#[C:12][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=2)[CH:8]=1)([O-:11])=[O:10]

参加物

8

反応物 2

HCID 137268EthynylpyridineHCID 2226292-Iodo-4-nitroaniline

生成物 1

HCID 591291894-Nitro-2-(pyridin-2-ylethynyl)aniline収率 60%

試薬・触媒・溶媒 5

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)触媒HCID 178418476HCID 178418476、化合物触媒HCID 962Water溶媒HCID 6228Dimethylformamide溶媒HCID 8471Triethylamine溶媒

反応条件

温度
60 °C

実験手順

To the solution of 2-iodo-4-nitroaniline (3.0 g, 11 mmol) in DMF (60 mL) and Et3N (60 mL) was added 2-ethynylpyridine (3.0 g, 45 mmol), Pd(PPh3)2Cl2 (600 mg) and CuI (200 mg) under N2. The reaction mixture was stirred at 60° C. for 12 h. The mixture was diluted with water and extracted with dichloromethane (3×100 mL). The combined organic layers were washed with brine, dried over anhydrous Na2SO4 and concentrated in vacuum. The residue was purified by chromatography on silica gel (5-10% ethyl acetate/petroleum ether) to afford 4-nitro-2-(pyridin-2-ylethynyl)aniline (1.5 g, 60%). 1H NMR (300 MHz, CDCl3) δ 8.60 (s, 1H), 8.13 (d, J=2.1 Hz, 1H), 7.98 (d, J=1.8, 6.9 Hz, 1H), 7.87-7.80 (m, 2H), 7.42-7.39 (m, 1H), 7.05 (brs, 2H), 6.80 (d, J=6.9 Hz, 1H).

後処理

  1. extractionextracted with dichloromethane (3×100 mL)
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over anhydrous Na2SO4
  4. concentrationconcentrated in vacuum
  5. customThe residue was purified by chromatography on silica gel (5-10% ethyl acetate/petroleum ether)

出典と根拠

ORDレコード
ord-17325209a9f74f01a8ffd46ac00df5bf
出典データセット
uspto-grants-2010_08
特許番号
US07776905B2

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