Indole-2-carboxaldehyde → 3-(1H-indol-2-ylmethylene)-2-oxo-2,3-dihydro-1H-indole-5-carboxylic acid

HRID 24488

反応式

HRID 24488 の反応式
[C:1]([C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[NH:9][C:8](=[O:13])[CH2:7]2)([OH:3])=[O:2].[NH:14]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH:16]=[C:15]1[CH:23]=O>N1CCCCC1.C(O)C>[NH:14]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH:16]=[C:15]1[CH:23]=[C:7]1[C:6]2[C:10](=[CH:11][CH:12]=[C:4]([C:1]([OH:3])=[O:2])[CH:5]=2)[NH:9][C:8]1=[O:13]

参加物

5

反応物 2

HCID 96389Indole-2-carboxaldehydeHCID 27733182-Oxindole-5-carboxylic acid

生成物 1

HCID 540903703-(1H-indol-2-ylmethylene)-2-oxo-2,3-dihydro-1H-indole-5-carboxylic acid収率 40%

試薬・触媒・溶媒 2

HCID 8082Piperidine触媒HCID 702Ethanol溶媒

実験手順

A mixture of 5-carboxy-2-oxindole (88.5 mg), indole-2-carbaldehyde (87 mg) (prepared according to Synthetic Communications, 1993, 23, 3109) and piperidine (1 drop) in ethanol (3 mL) was held in a sealed tube at 95° C. for 4 hours. The mixture was cooled to room temperature. The solid was filtered and acidified with 2N hydrochloric acid. The resulting solid was collected by vacuum filtration, washed with cold ethanol and dried in vacuum oven to give 60 mg (40% yield) of 3-(1H-indol-2-ylmethylene)-2-oxo-2,3-dihydro-1H-indole-5-carboxylic acid as a mustard-colored solid.

後処理

  1. filtrationThe solid was filtered
  2. filtrationThe resulting solid was collected by vacuum filtration
  3. washwashed with cold ethanol
  4. customdried in vacuum oven

出典と根拠

ORDレコード
ord-357e9239ad554dfba41aa9ad2f1e3a97
出典データセット
uspto-grants-2005_02
特許番号
US06855730B2

関連ノート

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