Phenyl isocyanate → 5-(4-bromo-2-methylphenyl)-3-[(tetrahydro-2H-pyran-2-yloxy)methyl]isoxazole

HRID 1184018

反応式

HRID 1184018 の反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]#[CH:9])=[C:4]([CH3:10])[CH:3]=1.[N+:11]([CH2:14][CH2:15][O:16][CH:17]1[CH2:22][CH2:21][CH2:20][CH2:19][O:18]1)([O-])=[O:12].C1(N=C=O)C=CC=CC=1.C(N(CC)CC)C>C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:12][N:11]=[C:14]([CH2:15][O:16][CH:17]3[CH2:22][CH2:21][CH2:20][CH2:19][O:18]3)[CH:9]=2)=[C:4]([CH3:10])[CH:3]=1

参加物

6

反応物 4

HCID 7672Phenyl isocyanateHCID 8471TriethylamineHCID 37486562-(2-Nitroethoxy)tetrahydropyranHCID 866719694-Bromo-1-ethynyl-2-methylbenzene

生成物 1

HCID 672484415-(4-bromo-2-methylphenyl)-3-[(tetrahydro-2H-pyran-2-yloxy)methyl]isoxazole

試薬・触媒・溶媒 1

HCID 1140Toluene溶媒

反応条件

温度
100 °C

実験手順

To a flask containing a solution of 4-bromo-1-ethynyl-2-methylbenzene (875 mg, 4.49 mmol) (may be prepared according to the procedures in Journal of Chemical Research (2007), 12 728-732) in toluene (20 mL), was added 2-(2-nitroethoxy)tetrahydro-2H-pyran (1.34 g, 7.63 mmol), phenyl isocyanate (1.82 g, 15.3 mmol), and triethylamine (1.50 mL, 10.8 mmol). The reaction was heated at 100° C. and stirred under nitrogen overnight. The reaction was cooled, quenched with methanol and filtered. The filtrate was evaporated in vacuo onto silica gel. Chromatography on silica gel with a heptane-ethyl acetate gradient (0-35% ethyl acetate) eluted 5-(4-bromo-2-methylphenyl)-3-[(tetrahydro-2H-pyran-2-yloxy)methyl]isoxazole as an orange oil (581 mg, 36.8%). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.57-1.71 (m, 4H) 1.73-1.82 (m, 1H) 1.82-1.91 (m, 1H) 2.51 (s, 3H) 3.56-3.62 (m, 1H) 3.89-3.96 (m, 1H) 4.69 (d, J=12.88 Hz, 1H) 4.76-4.79 (m, 1H) 4.86 (d, J=12.88 Hz, 1H) 6.51 (s, 1H) 7.42-7.46 (m, 1H) 7.48 (d, J=1.56 Hz, 1H) 7.59 (d, J=8.20 Hz, 1H).

後処理

  1. custommay be prepared
  2. temperatureThe reaction was cooled
  3. customquenched with methanol
  4. filtrationfiltered
  5. customThe filtrate was evaporated in vacuo onto silica gel
  6. washChromatography on silica gel with a heptane-ethyl acetate gradient (0-35% ethyl acetate) eluted 5-(4-bromo-2-methylphenyl)-3-[(tetrahydro-2H-pyran-2-yloxy)methyl]isoxazole as an orange oil (581 mg, 36.8%)

出典と根拠

ORDレコード
ord-38407e7e59ad47ff87ef48d76ff28652
出典データセット
uspto-grants-2014_03
特許番号
US08664401B2

関連ノート

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