反応 #87722

反応方程式

4-(3-(2-chloro-6-fluorophenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)benzamide

1-bromo-4-(trifluoromethyl)benzene

sodium tert-butoxide

→

desired product

収率 10.5%

4-(3-(2-Chloro-6-fluorophenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)-N-(4-(trifluoromethyl)phenyl)benzamide

収率 10.5%

溶媒

toluene

反応条件

後処理

1. 1
   温度The reaction mass was refluxed for 3-4 h
2. 2
   その他The reaction mass was quenched in water
3. 3
   抽出extracted in ethyl acetate
4. 4
   濃縮The organic layer was concentrated
5. 5
   その他to afford crude product which
6. 6
   その他was purified by column chromatography

実験手順

To a solution of 4-(3-(2-chloro-6-fluorophenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)benzamide (Intermediate-17, 0.100 g, 0.301 mmol) in dry toluene (5 mL) was added 1-bromo-4-(trifluoromethyl)benzene (0.101 g, 0.451 mmol), sodium tert-butoxide (0.058 g, 0.602 mmol), tris(diphynylideneacetone)dipalladium(0) (0.005 g, 0.0006 mmol), 4,5 bis(diphenylphosphino) and 9,9-dimethylxanthene (0.005 g, 0.0009 mmol) under nitrogen atmosphere. The reaction mass was refluxed for 3-4 h. The reaction mass was quenched in water and extracted in ethyl acetate. The organic layer was concentrated to afford crude product which was purified by column chromatography to afford 0.015 g of desired product. 1H NMR (300 MHz, DMSO d6): δ 7.40 (br s, 1H), 7.84 (t, J=9 Hz, 1H), 7.55 (d, 1H), 7.72-7.75 (m, 3H), 8.02 (d, J=8.1 Hz, 2H), 8.11 (br s, 3H) 10.61 (br s, 1H), 12.70 (br s, 1H). MS (m/z): 475.18 (M−H)−.

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