1,2-Dimethoxyethane → 2-[3-Methoxy-4-(pyridin-3-ylmethyl)phenyl]-1,3-benzoxazole

HRID 7751

反応式

HRID 7751 の反応式
Br[CH2:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[O:10][C:11]3[CH:17]=[CH:16][CH:15]=[CH:14][C:12]=3[N:13]=2)=[CH:5][C:4]=1[O:18][CH3:19].[N:20]1[CH:25]=[CH:24][CH:23]=[C:22](B(O)O)[CH:21]=1.C([O-])([O-])=O.[K+].[K+].COCCOC>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.O>[CH3:19][O:18][C:4]1[CH:5]=[C:6]([C:9]2[O:10][C:11]3[CH:17]=[CH:16][CH:15]=[CH:14][C:12]=3[N:13]=2)[CH:7]=[CH:8][C:3]=1[CH2:2][C:22]1[CH:21]=[N:20][CH:25]=[CH:24][CH:23]=1

参加物

7

反応物 4

HCID 80711,2-DimethoxyethaneHCID 11430Potassium CarbonateHCID 27343783-Pyridinylboronic acidHCID 219909912-[4-(Bromomethyl)-3-methoxyphenyl]-1,3-benzoxazole

生成物 1

HCID 102366482-[3-Methoxy-4-(pyridin-3-ylmethyl)phenyl]-1,3-benzoxazole

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒HCID 962Water溶媒

反応条件

温度
80 °C

実験手順

A mixture of 2-[4-(bromomethyl)-3-methoxyphenyl]-1,3-benzoxazole (190 mg, 0.58 mmol), 3-pyridylboronic acid (70 mg, 0.58 mmol), Pd(Ph3P)4 (70 mg, 0.06 mmol), K2CO3 (200 mg, 1.5 mmol), DME (6 mL) and H2O (3 mL) was degassed with bubbling Ar for 15 min. The mixture was heated at 80° C. for 1 h. The reaction was poured into H2O (40 mL) and extracted with CH2Cl2 (2×30 mL). The organic extracts were dried (MgSO4) and concentrated to afford a colorless solid. Purification of the solid by flash chromatography on silica gel (EtOAc:hexanes 3:1) afforded the desired 2-[3-methoxy-4-(pyridin-3-ylmethyl)phenyl]-1,3-benzoxazole as a yellow solid: 1H NMR (CDCl3, 300 MHz) δ 8.56 (br s, 1H), 8.45 (br d, 1H), 7.74–7.80 (m, 3H), 7.50–7.58 (m, 2H), 7.32–7.37 (m, 2H), 7.17–7.24 (m, 2H), 4.00 (s, 2H), 3.93 (s, 3H). MS (ESI) 317 (M+H)+.

後処理

  1. customwas degassed with bubbling Ar for 15 min
  2. additionThe reaction was poured into H2O (40 mL)
  3. extractionextracted with CH2Cl2 (2×30 mL)
  4. dry with materialThe organic extracts were dried (MgSO4)
  5. concentrationconcentrated
  6. customto afford a colorless solid
  7. customPurification of the solid by flash chromatography on silica gel (EtOAc:hexanes 3:1)

出典と根拠

ORDレコード
ord-a07ed9330a9844e9a2231169eeda2c61
出典データセット
uspto-grants-2006_08
特許番号
US07087601B2

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