5-Bromo-2-methoxypyridine → 6-(2-methoxypyridin-5-yl)-3-((E)-styryl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazole

HRID 2181549ノート

反応式

HRID 2181549 の反応式
Br[C:2]1[CH:3]=[CH:4][C:5]([O:8][CH3:9])=[N:6][CH:7]=1.C[Sn](C)C.C[Sn](C)C.I[C:19]1[CH:27]=[C:26]2[C:22]([C:23](/[CH:36]=[CH:37]/[C:38]3[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=3)=[N:24][N:25]2[CH2:28][O:29][CH2:30][CH2:31][Si:32]([CH3:35])([CH3:34])[CH3:33])=[CH:21][CH:20]=1>O1CCOCC1.C(OCC)(=O)C.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>[CH3:9][O:8][C:5]1[CH:4]=[CH:3][C:2]([C:19]2[CH:27]=[C:26]3[C:22]([C:23](/[CH:36]=[CH:37]/[C:38]4[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=4)=[N:24][N:25]3[CH2:28][O:29][CH2:30][CH2:31][Si:32]([CH3:33])([CH3:34])[CH3:35])=[CH:21][CH:20]=2)=[CH:7][N:6]=1

参加物

7

反応物 3

HCID 27348955-Bromo-2-methoxypyridineHCID 6327618HexamethylditinHCID 218772551H-Indazole, 6-iodo-3-[(1E)-2-phenylethenyl]-1-[[2-(trimethylsilyl)ethoxy]methyl]-

生成物 1

HCID 218774306-(2-methoxypyridin-5-yl)-3-((E)-styryl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazole収率 40.1%

試薬・触媒・溶媒 3

HCID 178418397HCID 178418397、化合物触媒2 回HCID 8857Ethyl Acetate溶媒HCID 312751,4-Dioxane溶媒

実験手順

A solution of 5-bromo-2-methoxypyridine (2.00 g, 6.10 mmol), hexamethylditin (1.15 g, 6.10 mmol), and Pd(PPh3)4 (0.28 g, 0.24 mmol) in degassed dioxane (10 ml) was refluxed under for 16 h. 6-Iodo-3-((E)-styryl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazole (2.90 g, 6.10 mmol) was added to above mixture, followed by Pd(PPh3)4 (0.35 g 0.31 mmol). The reaction mixture was refluxed for 16 h. The mixture was then diluted with ethyl acetate (150 ml), and washed with brine (30 ml). The organics were dried over MgSO4, then concentrated under reduced pressure. Purification by silica gel chromatography gave 6-(2-methoxypyridin-5-yl)-3-((E)-styryl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazole as a yellow solid (1.12 g, 40%). 1H NMR (300 MHz, CDCl3) δ 8.51 (d, 1H, J=2.5 Hz), 8.50 (d, 1H, J=9.1 Hz), 7.93 (dd, 1H, J=2.5, 8.6 Hz), 7.69 (s, 1H), 7.69-7.28 (m, 8H), 6.89 (d, 1H, J=8.6 Hz), 5.83 (s, 2H), 4.03 (s, 3H), 3.64 (t, 2H, J=8.3 Hz), 0.93 (t, 2H, J=8.3 Hz), −0.03 (s, 9H).

後処理

  1. temperatureThe reaction mixture was refluxed for 16 h
  2. washwashed with brine (30 ml)
  3. dry with materialThe organics were dried over MgSO4
  4. concentrationconcentrated under reduced pressure
  5. customPurification by silica gel chromatography

出典と根拠

ORDレコード
ord-4b3d6c909ceb46b8a483f30f97646457
出典データセット
uspto-grants-2005_05
特許番号
US06891044B2

反応ノート

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