Trifluoroacetic acid → 4,6-Di-tert-butyl-5-hydroxypyrimidine-2-carbaldehyde

HRID 1586692ノート

反応式

HRID 1586692 の反応式
FC(F)(F)C(O)=O.[CH3:8][C:9]([C:12]1[C:17]([O:18]COCCOC)=[C:16]([C:25]([CH3:28])([CH3:27])[CH3:26])[N:15]=[C:14]([CH:29]=[O:30])[N:13]=1)([CH3:11])[CH3:10].C([O-])(O)=O.[Na+]>C(Cl)Cl>[CH3:11][C:9]([C:12]1[C:17]([OH:18])=[C:16]([C:25]([CH3:28])([CH3:27])[CH3:26])[N:15]=[C:14]([CH:29]=[O:30])[N:13]=1)([CH3:8])[CH3:10]

参加物

5

反応物 3

HCID 6422Trifluoroacetic acidHCID 516892Sodium BicarbonateHCID 199229924,6-Bis(1,1-dimethylethyl)-5-[(2-methoxyethoxy)methoxy]-2-pyrimidine carboxaldehyde

生成物 1

HCID 152948964,6-Di-tert-butyl-5-hydroxypyrimidine-2-carbaldehyde収率 33%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

Trifluoroacetic acid (1.05 g, 9.2 mmol) is added to a solution of 4,6-bis(1,1-dimethylethyl)-5-[(2-methoxyethoxy)methoxy]-2-pyrimidine carboxaldehyde (1.0 g, 3.1 mmol) in methylene chloride and the reaction mixture is stirred at room temperature for 5 hours. The reaction mixture is neutralized by the addition of saturated aqueous NaHCO3 and the layers separated. The organic layer is washed with brine (50 mL), dried over MgSO4, and evaporated. Recrystallization of the residue from hexane gives pure 4,6-bis(1,1-dimethylethyl)-5-hydroxy-2-pyrimidine carboxaldehyde (0.24 g, 33%); mp 187°-189° C.

後処理

  1. customthe layers separated
  2. washThe organic layer is washed with brine (50 mL)
  3. dry with materialdried over MgSO4
  4. customevaporated
  5. customRecrystallization of the residue from hexane

出典と根拠

ORDレコード
ord-f02d395583874986b1e30f144b7dd7bf
出典データセット
uspto-grants-1993_06
特許番号
US05215986

反応ノート

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