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2-Bromopyridine → 4-(Pyridin-2-yloxy)benzonitrile

HRID 2167333
ノート
印刷プレビュー

反応式

HRID 2167333 の反応式
[OH:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1.CC(C)([O-])C.[K+].C1COCC1.Br[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][N:23]=1>CS(C)=O>[N:23]1[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=1[O:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 79732-BromopyridineHCID 8028TetrahydrofuranHCID 130194-CyanophenolHCID 23665647Potassium tert-butoxide

生成物 1

HCID 185258324-(Pyridin-2-yloxy)benzonitrile収率 63.2%

試薬・触媒・溶媒 1

HCID 679Dimethyl Sulfoxide溶媒2 回

反応条件

温度
160 °C

実験手順

4-Hydroxybenzonitrile (1.00 g, 8.39 mmol) was dissolved in anhydrous DMSO (5.0 mL) and was slowly added a solution of potassium tert-butoxide in THF (1.0 M, 16.8 mmol). The solution was stirred for 2 hours 30 minutes. A solution of 2-bromopyridine (2.65 g, 16.8 mmol) in DMSO (5.0 mL) was then added to the reaction mixture the whole was heated at 160° C. for 115 hours. The cooled mixture was partitioned between ethyl acetate (100 mL) and water (100 mL). The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×100 mL). The organic layers were dried with MgSO4, filtered and concentrated in vacuo. The crude solid was placed on a silica gel column and purified (EtOAc/Hex 1:6) to give the product as a light yellow solid (1.04 g, 63%). 1H NMR (500 MHz, CDCL3) δ(ppm): 7.01 (1H, d, J=8.2 Hz), 7.10 (1H, dd, J=7.2, 5.0 Hz), 7.24 (2H, d, J=9.0 Hz), 7.68 (2H, d, J=8.8 Hz), 7.77 (1H, ddd, J=8.3, 7.3, 2.0 Hz), 8.22 (1H, dd, J=5.0, 2.0 Hz). 13C NMR (125 MHz, CDCL3) δ(ppm): 108.0, 112.8 (CH), 118.9, 120.0 (CH), 121.6 (CH), 134.1 (CH), 140.2 (CH), 147.9 (CH), 158.2, 162.5. MS (FAB+): 197 (MH+). HRMS for C12H8N2O (MH+): calculated: 197.0713; found 197.0715.

後処理

  1. customThe cooled mixture was partitioned between ethyl acetate (100 mL) and water (100 mL)
  2. customThe organic layer was separated
  3. extractionthe aqueous layer was extracted with ethyl acetate (2×100 mL)
  4. dry with materialThe organic layers were dried with MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. custompurified (EtOAc/Hex 1:6)

出典と根拠

ORDレコード
ord-bed928a24e1240ac8f21821ecbf989a7
出典データセット
uspto-grants-2015_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09045442B2

反応ノート

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