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Ethyl orthoformate → 4-(4-Cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carbonitrile

HRID 1951425
ノート
印刷プレビュー

反応式

HRID 1951425 の反応式
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH:9]2[C:18]3[C:17](=[O:19])[NH:16][CH:15]=[C:14]([CH3:20])[C:13]=3[NH:12][C:11]([CH3:21])=[C:10]2[C:22]#[N:23])=[C:5]([O:24][CH3:25])[CH:4]=1)#[N:2].C(OCC)(OCC)O[CH2:28][CH3:29]>S(=O)(=O)(O)O>[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH:9]2[C:18]3[C:13](=[C:14]([CH3:20])[CH:15]=[N:16][C:17]=3[O:19][CH2:28][CH3:29])[NH:12][C:11]([CH3:21])=[C:10]2[C:22]#[N:23])=[C:5]([O:24][CH3:25])[CH:4]=1)#[N:2]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

4

反応物 2

HCID 31214Ethyl orthoformateHCID 674158664-(4-Cyano-2-methoxyphenyl)-2,8-dimethyl-5-oxo-1,4,5,6-tetrahydro-1,6-naphthyridine-3-carbonitrile

生成物 1

HCID 674168744-(4-Cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carbonitrile

試薬・触媒・溶媒 1

HCID 1118Sulfuric Acid触媒

反応条件

温度
140 °C

実験手順

3620 mg (10.83 mmol) of 4-(4-cyano-2-methoxyphenyl)-2,8-dimethyl-5-oxo-1,4,5,6-tetrahydro-1,6-naphthyridine-3-carbonitrile are suspended in 150 ml (901 mmol) of anhydrous triethyl orthoformate. The reaction mixture is heated to 140° C. Then 10 drops of concentrated sulfuric acid are added each hour. After complete reaction has been detected (analytical HPLC; reaction time about 36 h), the reaction mixture is cooled to room temperature and the precipitated product is filtered off. The precipitate is washed with ethyl acetate and diethyl ether and then purified by flash chromatography (silica gel; mobile phase: initially dichloromethane, then isohexane/ethyl acetate 1:1). The product fractions are combined and concentrated in a rotary evaporator, and the residue is then crystallized from ethyl acetate. Drying under high vacuum results in 1160 mg (30% of theory) of the title compound in the form of yellowish crystals.

後処理

  1. customAfter complete reaction
  2. custom(analytical HPLC; reaction time about 36 h)
  3. temperaturethe reaction mixture is cooled to room temperature
  4. filtrationthe precipitated product is filtered off
  5. washThe precipitate is washed with ethyl acetate and diethyl ether
  6. custompurified by flash chromatography (silica gel
  7. concentrationconcentrated in a rotary evaporator
  8. customthe residue is then crystallized from ethyl acetate
  9. customDrying under high vacuum

出典と根拠

ORDレコード
ord-eb9935e747fe4617b866356baff37fde
出典データセット
uspto-grants-2013_03
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08404709B2

反応ノート

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