Hydrochloric Acid → 5-Ureido-3-(quinol-4-ylmethylene)-2-oxindole

HRID 356994

反応式

HRID 356994 の反応式
[NH2:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])[C:5]2=[CH:12][C:13]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[N:16]=[CH:15][CH:14]=1.Cl.[O-:24][C:25]#[N:26].[Na+]>>[NH:1]([C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])[C:5]2=[CH:12][C:13]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[N:16]=[CH:15][CH:14]=1)[C:25]([NH2:26])=[O:24]

参加物

4

反応物 3

HCID 313Hydrochloric AcidHCID 517096Sodium CyanateHCID 545367025-Amino-3-(quinol-4-ylmethylene)-2-oxindole

生成物 1

HCID 676150015-Ureido-3-(quinol-4-ylmethylene)-2-oxindole収率 50%

実験手順

To a mixture of 5-amino-3-(quinol-4-ylmethylene)-2-oxindole (2.873 g, 10 mmol) in ice water (20 ml) was added 5N HCl (2 ml, 10 mmol) under stirring. Then the mixture was heated to 70°-80° C., sodium cyanate (0.715 g, 11 mmol) was added portionwise and the stirring was continued for further 4 h at this temperature. After cooling, the raw product was extracted with CHCl3, the organic layer washed to neutrality with saline solution, dried and evaporated in vacuo. The residue was chromatographed on silica gel, using CHCl3 --MeOH mixtures as eluant to give pure title compound in about 50% yield.

後処理

  1. temperatureThen the mixture was heated to 70°-80° C.
  2. temperatureAfter cooling
  3. extractionthe raw product was extracted with CHCl3
  4. washthe organic layer washed
  5. customdried
  6. customevaporated in vacuo
  7. customThe residue was chromatographed on silica gel

出典と根拠

ORDレコード
ord-b4425b770a6b4a36966e0c6e93a0ff61
出典データセット
uspto-grants-1998_11
特許番号
US05840745

関連ノート

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