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

HRID 7751

반응식

HRID 7751 반응식
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

참가 물질

7

반응물 4

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

생성물 1

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

시약·촉매·용매 2

HCID 178418397HCID 178418397, 화합물촉매HCID 962Water용매

반응 조건

온도
80 °C

실험 절차

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)+.

후처리

  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)

출처 및 근거

ORD 기록
ord-a07ed9330a9844e9a2231169eeda2c61
출처 데이터셋
uspto-grants-2006_08
특허 번호
US07087601B2

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