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Methylboronic Acid → 4-(3,5,6-Trimethylpyridin-2-yl)piperazine-1-carboxylic acid tert-butyl ester

HRID 1804120
ノート
印刷プレビュー

反応式

HRID 1804120 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2C(Cl)=CC(Cl)=C(Cl)[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C1(P(C2CCCCC2)C2C=CC=C[C:31]=2[C:36]2[C:41](OC)=[CH:40][CH:39]=[CH:38][C:37]=2OC)CCCCC1.[F-].[K+].CB(O)O>[Cl-].[Na+].O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C(OCC)(=O)C.O1CCCC1>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][N:11]([C:14]2[C:38]([CH3:39])=[CH:37][C:36]([CH3:31])=[C:41]([CH3:40])[N:15]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]
参加物実験手順後処理出典と根拠反応ノート

参加物

9

反応物 4

HCID 139377Methylboronic AcidHCID 522689Potassium FluorideHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 866587754-(3,5,6-Trichloropyridin-2-yl)piperazine-1-carboxylic acid tert-butyl ester

生成物 1

HCID 673809814-(3,5,6-Trimethylpyridin-2-yl)piperazine-1-carboxylic acid tert-butyl ester収率 306%

試薬・触媒・溶媒 4

HCID 167845palladium(II) acetate触媒HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒HCID 57417360Sodium chloride; water溶媒

実験手順

To a mixture of 4-(3,5,6-trichloropyridin-2-yl)piperazine-1-carboxylic acid tert-butyl ester (9.27 g) described in Preparation Example 173, palladium (II) acetate (851 mg), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (3.11 g), potassium fluoride (17.6 g) and methylboronic acid (9.08 g) was added tetrahydrofuran (190 mL), and the mixture was refluxed for 5.5 hr. After cooling, to the reaction mixture were added ethyl acetate and saturated brine and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over sodium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by column chromatography (hexane:ethyl acetate) to give the title compound (7.08 g).

後処理

  1. temperaturethe mixture was refluxed for 5.5 hr
  2. temperatureAfter cooling, to the reaction mixture
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried over sodium sulfate
  6. customThe solvent was evaporated under reduced pressure
  7. customthe residue was purified by column chromatography (hexane:ethyl acetate)

出典と根拠

ORDレコード
ord-95d28118eff74dcdb61b0292b103e3dd
出典データセット
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08354401B2

反応ノート

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