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Triethylamine → 3-(2,2-Dimethyl-1-oxopropyl)-1,2,3,4-tetrahydro-6-methyl-4-(3-nitrophenyl)-2-oxo-5-pyrimidinecarboxylic acid, ethyl ester

HRID 1590298
ノート
印刷プレビュー

反応式

HRID 1590298 の反応式
C[O:2][C:3]1[NH:4][C:5]([CH3:23])=[C:6]([C:18]([O:20][CH2:21][CH3:22])=[O:19])[CH:7]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([N+:15]([O-:17])=[O:16])[CH:10]=2)[N:8]=1.C(N(CC)CC)C.CN(C1C=CC=CN=1)C.[C:40](Cl)(=[O:45])[C:41]([CH3:44])([CH3:43])[CH3:42]>ClCCl>[CH3:42][C:41]([CH3:44])([CH3:43])[C:40]([N:8]1[CH:7]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([N+:15]([O-:17])=[O:16])[CH:10]=2)[C:6]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[C:5]([CH3:23])[NH:4][C:3]1=[O:2])=[O:45]
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 8471TriethylamineHCID 218852-DimethylaminopyridineHCID 62493Pivaloyl chlorideHCID 139125831,4-Dihydro-2-methoxy-6-methyl-4-(3-nitrophenyl)-5-pyrimidinecarboxylic acid, ethyl ester

生成物 1

HCID 867467173-(2,2-Dimethyl-1-oxopropyl)-1,2,3,4-tetrahydro-6-methyl-4-(3-nitrophenyl)-2-oxo-5-pyrimidinecarboxylic acid, ethyl ester

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

A solution of 1,4-dihydro-2-methoxy-6-methyl-4-(3-nitrophenyl)-5-pyrimidinecarboxylic acid, ethyl ester (0.96 g., 3.0 mmole), dry triethylamine (1.25 ml., 9.0 mmole), and dimethylaminopyridine (36 mg., 0.3 mmole) in dichloromethane (12 ml.) under argon is treated with pivaloyl chloride (0.44 ml., 3.6 mmole). After stirring for 45 minutes at room temperature, the reaction mixture is evaporated. The residue is taken up in tetrahydrofuran/methanol (10 ml. each) and treated with 2N hydrochloric acid (6.0 ml., pH 1). After stirring at room temperature for 3.0 hours, the reaction is quenched with saturated sodium bicarbonate, partially evaporated and extracted with ethyl acetate. The organic phase is washed with saturated sodium chloride and evaporated. Flash chromatography and crystallization from dichloromethane/isopropyl ether gives the title compound as white crystals (420 mg. , m. p. 155°-156°. TLC(silica gel; ethyl acetate:hexane, 1:1)Rf =0.67.

後処理

  1. customthe reaction mixture is evaporated
  2. additioneach) and treated with 2N hydrochloric acid (6.0 ml., pH 1)
  3. stirringAfter stirring at room temperature for 3.0 hours
  4. customthe reaction is quenched with saturated sodium bicarbonate
  5. custompartially evaporated
  6. extractionextracted with ethyl acetate
  7. washThe organic phase is washed with saturated sodium chloride
  8. customevaporated
  9. customFlash chromatography and crystallization from dichloromethane/isopropyl ether

出典と根拠

ORDレコード
ord-98b2611ecfbf4c4795d62d4917581552
出典データセット
uspto-grants-1993_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05202330

反応ノート

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