Cesium fluoride → methyl 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetate

HRID 62052

反応式

HRID 62052 の反応式
Br[C:2]1[N:6]=[CH:5][N:4]([C:7]2[CH:12]=[CH:11][C:10]([O:13][C:14]([F:17])([F:16])[F:15])=[CH:9][CH:8]=2)[N:3]=1.CC1(C)C(C)(C)OB([C:26]2[CH:31]=[CH:30][C:29]([CH2:32][C:33]([O:35][CH3:36])=[O:34])=[CH:28][CH:27]=2)O1.F[B-](F)(F)F.C([PH+](C(C)(C)C)C(C)(C)C)(C)(C)C.[F-].[Cs+]>O1CCOCC1.O.C(O[Pd]OC(=O)C)(=O)C>[F:15][C:14]([F:17])([F:16])[O:13][C:10]1[CH:11]=[CH:12][C:7]([N:4]2[CH:5]=[N:6][C:2]([C:26]3[CH:31]=[CH:30][C:29]([CH2:32][C:33]([O:35][CH3:36])=[O:34])=[CH:28][CH:27]=3)=[N:3]2)=[CH:8][CH:9]=1

参加物

8

反応物 4

HCID 25953Cesium fluorideHCID 2734635Tri-tert-butylphosphine tetrafluoroborateHCID 11219601Methyl 2-[4-(tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]acetateHCID 712094283-bromo-1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazole

生成物 1

HCID 90405381methyl 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)acetate

試薬・触媒・溶媒 3

HCID 167845palladium(II) acetate触媒HCID 962Water溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
60 °C

実験手順

In a 200 mL flask, 3-bromo-1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazole (3.45 g, 11.2 mmol), and methyl 2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate (3.71 g, 13.4 mmol) were diluted with dioxane (45 mL) and water (11 mL). This solution was sparged with nitrogen gas for 10 minutes. Then tri-tert-butylphosphonium tetrafluoroborate (0.325 g, 1.12 mmol), diacetoxypalladium (0.126 g, 0.560 mmol) and cesium fluoride (3.40 g, 22.4 mmol) were added as solids. The flask was sealed and evacuated with vacuum and purged with nitrogen gas. The reaction was warmed to an internal temperature of 60° C. and stirred for 18 hours. The reaction was poured into a brine solution and extracted with ethyl acetate (3×50 mL). The combined organics were dried over magnesium sulfate, filtered, and concentrated. The resulting residue was purified by flash chromatography using 0-10% ethyl acetate/hexanes as eluent to afford the title compound as an off white solid (3.45 g, 82%): 1H NMR (400 MHz, DMSO-d6) δ 9.41 (s, 1H), 8.11-8.04 (m, 4H), 7.63 (ddt, J=7.9, 2.1, 1.1 Hz, 2H), 7.48-7.36 (m, 2H), 3.77 (s, 2H), 3.64 (s, 3H); 19F NMR (376 MHz, DMSO-d6) δ −57.02; ESIMS m/z 378 ([M+H]+)

後処理

  1. customThis solution was sparged with nitrogen gas for 10 minutes
  2. customThe flask was sealed
  3. customevacuated with vacuum
  4. custompurged with nitrogen gas
  5. additionThe reaction was poured into a brine solution
  6. extractionextracted with ethyl acetate (3×50 mL)
  7. dry with materialThe combined organics were dried over magnesium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe resulting residue was purified by flash chromatography

出典と根拠

ORDレコード
ord-9f9a5bc1a35b428d823c686cc2f31974
出典データセット
uspto-grants-2016_09
特許番号
US09445594B2

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