Toluene → 2-Ethyl 4'-methyl 2'-methyl-biphenyl-2,4'-dicarboxylate

HRID 541139ノート

反応式

HRID 541139 の反応式
Br[C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][C:3]=1[CH3:12].CC1(C)C(C)(C)OB([C:21]2[CH:31]=[CH:30][CH:29]=[CH:28][C:22]=2[C:23]([O:25][CH2:26][CH3:27])=[O:24])O1.C1(C)C=CC=CC=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>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.O>[CH3:12][C:3]1[CH:4]=[C:5]([C:6]([O:8][CH3:9])=[O:7])[CH:10]=[CH:11][C:2]=1[C:21]1[C:22]([C:23]([O:25][CH2:26][CH3:27])=[O:24])=[CH:28][CH:29]=[CH:30][CH:31]=1

参加物

7

反応物 4

HCID 1140TolueneHCID 62657Potassium Phosphate, TribasicHCID 2773962Ethyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoateHCID 3294148Methyl 4-bromo-3-methylbenzoate

生成物 1

HCID 594926732-Ethyl 4'-methyl 2'-methyl-biphenyl-2,4'-dicarboxylate収率 81%

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒HCID 962Water溶媒

実験手順

Under a nitrogen atmosphere, to a mixture of methyl 4-bromo-3-methylbenzoate (2.291 g), ethyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate (3.313 g), toluene (20 ml), water (10 ml) and tripotassium phosphate (4.246 g) was added tetrakis(triphenylphosphine)palladium(0) (0.578 g) at room temperature, and the mixture was stirred with heating under reflux overnight. The reaction mixture was cooled to room temperature, and partitioned in a separatory funnel. The organic layer was successively washed with water and saturated brine, dried over anhydrous sodium sulfate, and filtered. The filtrate was concentrated under reduced pressure and the obtained residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=95/5) to give the title compound (2.404 g, 81%)

後処理

  1. temperaturewith heating
  2. temperatureunder reflux overnight
  3. custompartitioned in a separatory funnel
  4. washThe organic layer was successively washed with water and saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated under reduced pressure
  8. customthe obtained residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=95/5)

出典と根拠

ORDレコード
ord-0f23c9ee656441ac9519f9031a3ff898
出典データセット
uspto-grants-2014_10
特許番号
US08871934B2

反応ノート

読み込み中…