Potassium Carbonate → 2-[3-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-4-yl]-4-(trifluoromethyl)phenol

HRID 46387ノート

反応式

HRID 46387 の反応式
Br[C:2]1[C:3]([N+:13]([O-:15])=[O:14])=[N:4][N:5]([CH:7]2[CH2:12][CH2:11][CH2:10][CH2:9][O:8]2)[CH:6]=1.C(=O)([O-])[O-].[K+].[K+].[OH:22][C:23]1[CH:28]=[CH:27][C:26]([C:29]([F:32])([F:31])[F:30])=[CH:25][C:24]=1B(O)O>COCCOC.C(OCC)(=O)C.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>[N+:13]([C:3]1[C:2]([C:24]2[CH:25]=[C:26]([C:29]([F:32])([F:31])[F:30])[CH:27]=[CH:28][C:23]=2[OH:22])=[CH:6][N:5]([CH:7]2[CH2:12][CH2:11][CH2:10][CH2:9][O:8]2)[N:4]=1)([O-:15])=[O:14]

参加物

7

反応物 3

HCID 11430Potassium CarbonateHCID 59436609(2-Hydroxy-5-(trifluoromethyl)phenyl)boronic acidHCID 666527944-bromo-3-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole

生成物 1

HCID 669055812-[3-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-4-yl]-4-(trifluoromethyl)phenol収率 54%

試薬・触媒・溶媒 3

HCID 178418397HCID 178418397、化合物触媒HCID 80711,2-Dimethoxyethane溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
75 °C

実験手順

To a solution of 4-bromo-3-nitro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole (Preparation 869, 18.95 g, 0.06864 mol) in 1,2-dimethoxyethane (175 mL) was added aqueous potassium carbonate (2M in water, 68.0 mL, 0.123 mol) and tetrakis(triphenylphosphine)palladium(0) (6.34 g, 0.00549 mol). The reaction was sparged 3 times with Argon and heated to 75° C. To this, [2-hydroxy-5-(trifluoromethyl)phenyl]boronic acid (Preparation 871, 21.22 g, 0.103 mol) was added in four portions over six hours. The reaction solution was heated for an additional 12 hours and then allowed to cool. The mixture was diluted with ethyl acetate, washed with water and brine, dried over anhydrous magnesium sulfate, filtered, and concentrated. Purification by automated flash column chromatography using a 0-50% ethyl acetate/hexanes gradient and a 80 g column gave the title compound (13.2 g, 54%) as a yellow oil.

後処理

  1. customThe reaction was sparged 3 times with Argon
  2. temperatureThe reaction solution was heated for an additional 12 hours
  3. temperatureto cool
  4. washwashed with water and brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customPurification by automated flash column chromatography

出典と根拠

ORDレコード
ord-31a0360ca9c84f51b6e7ec0fcbae810e
出典データセット
uspto-grants-2013_09
特許番号
US08541588B2

反応ノート

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