4-Bromotriphenylamine → Diphenyl-(4-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-phenyl)-amine

HRID 2118374

反応式

HRID 2118374 の反応式
C([Li])CCC.CC(C)=O.C(=O)=O.Br[C:14]1[CH:32]=[CH:31][C:17]([N:18]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[CH:16][CH:15]=1.C(O[B:37]1[O:41][C:40]([CH3:43])([CH3:42])[C:39]([CH3:45])([CH3:44])[O:38]1)(C)C>C1COCC1>[C:19]1([N:18]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C:17]2[CH:31]=[CH:32][C:14]([B:37]3[O:41][C:40]([CH3:43])([CH3:42])[C:39]([CH3:45])([CH3:44])[O:38]3)=[CH:15][CH:16]=2)[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

参加物

6

反応物 4

HCID 6428384-BromotriphenylamineHCID 50177412-Isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 18522661Acetone cardiceHCID 178418339Butyllithium

生成物 1

HCID 11639307Diphenyl-(4-(4,4,5,5-tetramethyl-(1,3,2)dioxaborolan-2-yl)-phenyl)-amine収率 72.8%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
-78 °C

実験手順

n-Butyllithium was added dropwise via syringe to a −78° C. (acetone-dry ice cooling bath) solution of 4-bromo-N,N-diphenylaniline (24 g, 0.074 mole) in 175 ml dry THF. Stirring was continued at −78° C. for an hour and then at −50° C. for an hour. The mixture was cooled to −78° C. and 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (17.22 g, 0.0925 mole) added via syringe in one portion. The temperature was maintained at −78° C. for three hours. The cooling bath was removed and the reaction left to warm to room temperature while standing for 12 hours. The reaction mixture was poured into saturated ammonium acetate and extracted with ether. The ether layer was dried over magnesium sulfate and concentrated to give a viscous oil. Purification by column chromatography (silica gel eluting with hexane:toluene mixtures of increasing gradient from 100% hexane to 40% hexane) gave N,N-diphenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline as an oil (19.9 g, 72.8% yield), which slowly crystallized to a solid on standing.

後処理

  1. waitwas continued at −78° C. for an hour
  2. waitat −50° C. for an hour
  3. temperatureThe temperature was maintained at −78° C. for three hours
  4. customThe cooling bath was removed
  5. waitthe reaction left
  6. temperatureto warm to room temperature
  7. additionThe reaction mixture was poured into saturated ammonium acetate
  8. extractionextracted with ether
  9. dry with materialThe ether layer was dried over magnesium sulfate
  10. concentrationconcentrated
  11. customto give a viscous oil
  12. customPurification
  13. temperatureby column chromatography (silica gel eluting with hexane:toluene mixtures of increasing gradient from 100% hexane to 40% hexane)

出典と根拠

ORDレコード
ord-e2e6c4b2c97a4559af1ee26c67fadf01
出典データセット
uspto-grants-2008_10
特許番号
US07442760B2

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