Trimethylsilyl cyanide → [4-(1,3-Benzoxazol-2-yl)-2-(trifluoromethyl)phenyl]acetonitrile

HRID 7694

Reaktionsgleichung

Reaktionsgleichung von HRID 7694
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[C:18]([F:21])([F:20])[F:19].[C:22]([Si](C)(C)C)#[N:23].CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C(#N)C>[O:10]1[C:11]2[CH:17]=[CH:16][CH:15]=[CH:14][C:12]=2[N:13]=[C:9]1[C:6]1[CH:7]=[CH:8][C:3]([CH2:2][C:22]#[N:23])=[C:4]([C:18]([F:21])([F:20])[F:19])[CH:5]=1

Komponenten

5

Versuchsvorschrift

To a suspension of 2-[4-(bromomethyl)-3-(trifluoromethyl)phenyl]-1,3-benzoxazole (528 mg, 1.5 mmol) and cyanotrimethylsilane (0.30 mL, 2.2 mmol) in acetonitrile (19 mL) was added TBAF (1.0M in THF, 2.2 mL, 2.2 mmol) and the mixture was stirred at rt for 2 h. The solvent was removed in vacuo and the crude was purified by flash chromatography eluting with EtOAc:hexanes (1:9) to afford the desired [4-(1,3-benzoxazol-2-yl)-2-(trifluoromethyl)phenyl]acetonitrile as a colorless solid. 1H NMR (CDCl3, 300 MHz) δ 8.60 (s, 1H), 8.48 (d, 1H), 7.88 (d, 1H), 7.82 (m, 1H), 7.63 (m, 1H), 7.43 (m, 2H), 4.05 (s, 2H). MS (ESI) 303 (M+H)+.

Aufarbeitung

  1. customThe solvent was removed in vacuo
  2. customthe crude was purified by flash chromatography
  3. washeluting with EtOAc:hexanes (1:9)

Quellen und Nachweise

ORD-Eintrag
ord-26845d3d550d49b5a8a35ee75d6d3a4d
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07087601B2

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