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

HRID 1772554
ノート
印刷プレビュー

反応式

HRID 1772554 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.[CH2:18]([O:25][C:26](=[O:47])[NH:27][C:28]([CH3:46])([CH3:45])[CH2:29][C:30]1[CH:35]=[CH:34][C:33](B2OC(C)(C)C(C)(C)O2)=[CH:32][CH:31]=1)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.F[B-](F)(F)F.C([PH+](C(C)(C)C)C(C)(C)C)(C)(C)C.[F-].[Cs+]>O1CCOCC1.O.[Cl-].[Na+].O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH2:18]([O:25][C:26](=[O:47])[NH:27][C:28]([CH3:45])([CH3:46])[CH2:29][C:30]1[CH:35]=[CH:34][C:33]([C:2]2[N:6]=[CH:5][N:4]([C:7]3[CH:12]=[CH:11][C:10]([O:13][C:14]([F:17])([F:16])[F:15])=[CH:9][CH:8]=3)[N:3]=2)=[CH:32][CH:31]=1)[C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=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

8

反応物 4

HCID 25953Cesium fluorideHCID 2734635Tri-tert-butylphosphine tetrafluoroborateHCID 712094283-bromo-1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazoleHCID 90438188Benzyl(2-methyl-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propan-2-yl)carbamate

生成物 1

HCID 90438210benzyl (2-methyl-1-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)propan-2-yl)carbamate
収率 16.3%

試薬・触媒・溶媒 3

HCID 167845palladium(II) acetate触媒HCID 218864351,4-Dioxane--water (1/1)溶媒HCID 57417360Sodium chloride; water溶媒

反応条件

温度
70 °C

実験手順

A mixture of 3-bromo-1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazole (C1) (4.28 g, 13.9 mmol), benzyl(2-methyl-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propan-2-yl)carbamate (CB7) (6.12 g, 15.0 mmol), tri-tert-butylphosphonium tetrafluoroborate (0.390 g, 1.40 mmol), palladium(II) acetate (0.150 g, 0.680 mmol), and cesium fluoride (4.34 g, 28.6 mmol) in dioxane/water (4:1, 90 mL) was heated at 70° C. overnight. The reaction was cooled and diluted with brine and extracted with ethyl acetate (2×). The organic layer was dried over sodium sulfate, filtered, and concentrated. Purification by flash column chromatography using 0-100% ethyl acetate/hexanes as eluent provided the title compound as a clear oil (1.16 g, 15%): 1H NMR (400 MHz, CDCl3) δ 8.57 (s, 1H), 8.06 (d, J=8.2 Hz, 2H), 7.81 (d, J=9.0 Hz, 2H), 7.44-7.32 (m, 7H), 7.19 (d, J=8.2 Hz, 2H), 5.12 (s, 2H), 4.56 (s, 1H), 3.05 (s, 2H), 1.33 (s, 6H); 19F NMR (376 MHz, CDCl3) δ −58.02; ESIMS m/z 511 ([M+H]+).

後処理

  1. temperatureThe reaction was cooled
  2. extractionextracted with ethyl acetate (2×)
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by flash column chromatography

出典と根拠

ORDレコード
ord-d42c5e0f074244c0bbc6b066de03fb56
出典データセット
uspto-grants-2016_02
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09249133B2

反応ノート

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