Cyanoacetamide → 5-Ethyl-6-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile

HRID 2081529

反応式

HRID 2081529 の反応式
[CH2:1]([CH:3]([C:6](=O)[CH3:7])[CH:4]=O)[CH3:2].[Na].[C:10]([CH2:12][C:13]([NH2:15])=[O:14])#[N:11].C([O-])(=O)C.[NH2+]1CCCCC1>O.C(O)(=O)C>[C:10]([C:12]1[C:13](=[O:14])[NH:15][C:1]([CH3:2])=[C:3]([CH2:6][CH3:7])[CH:4]=1)#[N:11]

参加物

7

反応物 4

HCID 7898CyanoacetamideHCID 3014295Piperidinium acetateHCID 5360545SodiumHCID 152284102-Ethyl-3-oxobutanal

生成物 1

HCID 102411095-Ethyl-6-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile

試薬・触媒・溶媒 2

HCID 176Acetic Acid溶媒HCID 962Water溶媒

実験手順

According to the method described in J. Heterocyclic Chem., 24, 351 (1987), a mixture of 2-ethyl-3-oxobutanal, sodium salt (37.5 g, 0.275 mmol), cyanoacetamide (25.2 g, 0.30 mol), aqueous piperidinium acetate (22 mL) [prepared from glacial acetic acid (4.2 mL), water (10 mL) and piperidine (7.2 mL)] in water (775 ml) was refluxed for four hours. Glacial acetic acid (30 ml) was added cautiously (much foaming) as the product precipitated. Upon cooling to room temperature, the product was collected by filtration, washed with cold water and air dried. The product had m.p. of 237°-240° C.

後処理

  1. temperaturewas refluxed for four hours
  2. customprecipitated
  3. filtrationthe product was collected by filtration
  4. washwashed with cold water and air
  5. customdried

出典と根拠

ORDレコード
ord-4cee11361f484c01826e162834fc1fa5
出典データセット
uspto-grants-1993_02
特許番号
US05185251

関連ノート

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