1,3-Dichloroacetone → 4-Chloromethyl-2-styryl-oxazole

HRID 1584326

反応式

HRID 1584326 の反応式
[C:1]([NH2:11])(=[O:10])[CH:2]=[CH:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[Cl:12][CH2:13][C:14]([CH2:16]Cl)=O.C(=O)([O-])[O-].[K+].[K+]>O>[Cl:12][CH2:13][C:14]1[N:11]=[C:1](/[CH:2]=[CH:3]/[C:4]2[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=2)[O:10][CH:16]=1

参加物

5

反応物 3

HCID 107931,3-DichloroacetoneHCID 11430Potassium CarbonateHCID 121352-Propenamide, 3-phenyl-

生成物 1

HCID 220097524-Chloromethyl-2-styryl-oxazole収率 47%

試薬・触媒・溶媒 1

HCID 962Water溶媒

反応条件

温度
130 °C

実験手順

A mixture of cinnamamide (25.3 g) and 1,3-dichloroacetone (20.9 g) was heated for one hour at 130° C. The reaction mixture was poured into water, which was neutralized with potassium carbonate, followed by extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4) and concentrated. The concentrate was purified by column chromatography on silica gel. From the fraction eluted with ether-hexane (1:5, v/v), was obtained 4-chloromethyl-2-[(E)-styryl] oxazole (16.9 g, 47%), which was recrystallized from ether-hexane to yield colorless needless, m.p.72-73° C.

後処理

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe ethyl acetate layer was washed with water
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe concentrate was purified by column chromatography on silica gel
  6. washFrom the fraction eluted with ether-hexane (1:5

出典と根拠

ORDレコード
ord-c13f1359046844c7ae845f82660227f3
出典データセット
uspto-grants-1999_08
特許番号
US05932601

関連ノート

読み込み中…