Oxalyl chloride → 4,6-dimethoxy-2,3-dihydro-1H-indole-2,3-dione

HRID 1826252ノート

反応式

HRID 1826252 の反応式
Cl.[CH3:2][O:3][C:4]1[CH:5]=[C:6]([CH:8]=[C:9]([O:11][CH3:12])[CH:10]=1)[NH2:7].[C:13](Cl)(=[O:17])[C:14](Cl)=[O:15]>CO>[CH3:12][O:11][C:9]1[CH:10]=[C:4]([O:3][CH3:2])[CH:5]=[C:6]2[C:8]=1[C:13](=[O:17])[C:14](=[O:15])[NH:7]2

参加物

4

反応物 2

HCID 65578Oxalyl chlorideHCID 218603Benzenamine, 3,5-dimethoxy-, hydrochloride (1:1)

生成物 1

HCID 115575224,6-dimethoxy-2,3-dihydro-1H-indole-2,3-dione

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

A mixture of 3,5-dimethoxyaniline hydrochloride (54.7 g), oxalyl chloride (54 ml) and methanol (500 ml) was stirred and heated to reflux for 1.5 hours. The mixture was cooled to ambient temperature. The precipitate was isolated, washed in turn with methanol and diethyl ether and dried under vacuum to give 4,6-dimethoxy-2,3-dioxoindoline (55 g); NMR Spectrum: (DMSOd6) 3.85 (s, 3H), 3.9 (s, 3H), 6.0 (s, 1H), 6.2 (s, 1H), 10.9 (s, 1H); Mass Spectrum: M+Na+ 230.

後処理

  1. temperatureheated
  2. temperatureto reflux for 1.5 hours
  3. customThe precipitate was isolated
  4. washwashed in turn with methanol and diethyl ether
  5. customdried under vacuum

出典と根拠

ORDレコード
ord-7fd88c2de5234efa83bc73fc3aed1068
出典データセット
uspto-grants-2006_05
特許番号
US07049438B2

反応ノート

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