Hydrochloric Acid → Ethyl 4-amino-3-nitrobenzimidate hydrochloride

HRID 1961492ノート

反応式

HRID 1961492 の反応式
NC1C=CC(C#N)=CC=1[N+]([O-])=O.[ClH:13].[CH2:14]([O:16][C:17](=[NH:28])[C:18]1[CH:23]=[CH:22][C:21]([NH2:24])=[C:20]([N+:25]([O-:27])=[O:26])[CH:19]=1)[CH3:15]>O1CCOCC1.C(O)C.C(OCC)C>[ClH:13].[CH2:14]([O:16][C:17](=[NH:28])[C:18]1[CH:23]=[CH:22][C:21]([NH2:24])=[C:20]([N+:25]([O-:27])=[O:26])[CH:19]=1)[CH3:15]

参加物

7

反応物 3

HCID 313Hydrochloric AcidHCID 5959014-Amino-3-nitrobenzonitrileHCID 53872271Ethyl 4-amino-3-nitrobenzimidate

生成物 1

HCID 67073287Ethyl 4-amino-3-nitrobenzimidate hydrochloride

試薬・触媒・溶媒 3

HCID 702Ethanol溶媒2 回HCID 3283Diethyl Ether溶媒2 回HCID 312751,4-Dioxane溶媒

反応条件

温度
2.5 °C

実験手順

A mixture of 4-amino-3-nitrobenzonitrile (63.3 g, 388 mmol) in 1,4-dioxane (600 mL) and anhydrous ethanol (600 mL) was cooled in an ice water bath to 0-5° C. and treated with gaseous HCl for 1.5 h. The reaction mixture was tightly sealed and allowed to warm up to room temperature with stirring for 18 h. The flask was then carefully unsealed and the reaction mixture was diluted with anhydrous diethyl ether (about 2.4 L) until a cloudy solution was obtained. A minimum amount of absolute ethanol required to give a clear solution was then added, and the resulting solution stirred until crystals of 4-amino-3-nitro-benzimidic acid ethyl ester were observed. Ether was then cautiously added to complete the crystallization process and the suspension was allowed to stand for about 30 minutes. The crystals were filtered and washed with dry diethyl ether, then allowed to dry under aspirator vacuum. The crystals were dried in vacuo to give 4-amino-3-nitro-benzimidic acid ethyl ester hydrochloride (84.6 g) as off-white crystals.

後処理

  1. customThe reaction mixture was tightly sealed
  2. temperatureto warm up to room temperature
  3. customwas obtained
  4. customto give a clear solution
  5. additionwas then added
  6. waitto stand for about 30 minutes
  7. filtrationThe crystals were filtered
  8. washwashed with dry diethyl ether
  9. customto dry under aspirator vacuum
  10. customThe crystals were dried in vacuo

出典と根拠

ORDレコード
ord-f1cecd949c21491bb75523cffa0ccbe7
出典データセット
uspto-grants-2013_04
特許番号
US08415328B2

反応ノート

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