Ethyl Acetate → 2-tert-butyl-4-chloro-5-(2-tert-butyldimethylsilyloxy-1-(4-tert-butylphenyl)-1-ethyl)oxy-3(2H)-pyridazinone

HRID 1392859ノート

反応式

HRID 1392859 の反応式
[C:1]([N:5]1[C:10](=[O:11])[C:9]([Cl:12])=[C:8](Cl)[CH:7]=[N:6]1)([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[Cs+].[Cs+].[Si:20]([O:27][CH2:28][CH:29]([OH:40])[C:30]1[CH:35]=[CH:34][C:33]([C:36]([CH3:39])([CH3:38])[CH3:37])=[CH:32][CH:31]=1)([C:23]([CH3:26])([CH3:25])[CH3:24])([CH3:22])[CH3:21].C(OCC)(=O)C>CN(C=O)C>[C:1]([N:5]1[C:10](=[O:11])[C:9]([Cl:12])=[C:8]([O:40][CH:29]([C:30]2[CH:31]=[CH:32][C:33]([C:36]([CH3:39])([CH3:38])[CH3:37])=[CH:34][CH:35]=2)[CH2:28][O:27][Si:20]([C:23]([CH3:26])([CH3:25])[CH3:24])([CH3:21])[CH3:22])[CH:7]=[N:6]1)([CH3:4])([CH3:3])[CH3:2]

参加物

6

反応物 4

HCID 8857Ethyl AcetateHCID 10796Cesium carbonateHCID 27822252-Tert-butyl-4,5-dichloro-2,3-dihydropyridazin-3-oneHCID 596786511-Tert-butyldimethylsilyloxy-2-hydroxy-2-(4-tert-butylphenyl)ethane

生成物 1

HCID 671007092-tert-butyl-4-chloro-5-(2-tert-butyldimethylsilyloxy-1-(4-tert-butylphenyl)-1-ethyl)oxy-3(2H)-pyridazinone

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
70 °C

実験手順

To a solution of 2-tert-butyl-4,5-dichloro-3(2H)-pyridazinone (0.5 g, 2.27 mmol) in DMF (10 ml) were added anhydrous cesium carbonate (0.74 g, 2.27 mmol) and 1-tert-butyldimethylsilyloxy 2-hydroxy 2-(4-tertbutylphenyl) ethane (0.7 g, 2.27 mmol). The mixture is stirred for 2 hours at 70° C. and then cooled to room temperature and ethyl acetate is added to it. The solution is then washed with water, dried and concentrated and the residue subjected to purification by flash chromatography (silica gel; ethyl acetate/hexanes) to give the above compound.

後処理

  1. temperaturecooled to room temperature
  2. washThe solution is then washed with water
  3. customdried
  4. concentrationconcentrated
  5. customthe residue subjected to purification by flash chromatography (silica gel; ethyl acetate/hexanes)
  6. customto give the above compound

出典と根拠

ORDレコード
ord-be8966820cd74ad8841f7c01f531c9fd
出典データセット
uspto-grants-2008_03
特許番号
US07344702B2

反応ノート

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