Water → 3-Benzoylpyrrole

HRID 22406

反応式

HRID 22406 の反応式
[H-].[Na+].[C:3]1([C:9]([CH:11]=[CH2:12])=O)[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.S([CH2:23][N+:24]#[C-:25])(C1C=CC(C)=CC=1)(=O)=O.[OH2:26]>C(OCC)C.CS(C)=O>[C:9]([C:11]1[CH:12]=[CH:25][NH:24][CH:23]=1)(=[O:26])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

参加物

7

反応物 4

HCID 962WaterHCID 130281-Phenyl-2-propen-1-oneHCID 24758Sodium hydrideHCID 161915Tosylmethyl isocyanide

生成物 1

HCID 27732343-Benzoylpyrrole

試薬・触媒・溶媒 2

HCID 679Dimethyl Sulfoxide溶媒HCID 3283Diethyl Ether溶媒3 回

実験手順

To a stirred suspension of sodium hydride (8.0 g) in 200 ml of dry ethyl ether was added dropwise a solution of phenylvinylketone (13.22 g) and tosylmethyl isocyanide (19.52) in 150 ml of dry methyl sulfoxide and 300 ml of dry ethyl ether at such a rate that the ether refluxed gently. After complete addition, the suspension was stirred at room temperature for 30 minutes and subsequently hydrolyzed by dropwise addition of 200 ml of water. The ether layer was separated and the aqueous layer extracted with ethyl acetate. The combined organic layers were washed with water, 0.1N sulfuric acid, and again with water. The organic phase was dried over magnesium sulfate, filtered and evaporated in vacuo. The residue was purified by flash column chromatography (silica gel, DCM/ethyl acetate, 5:1). The desired fractions were concentrated and the residual oil was crystallized from DCM/hexane, affording the product as crystals (7.11 g), m.p. 98°-99° C. (lit*m.p. 96°-97° C.).

後処理

  1. temperaturerefluxed gently
  2. additionAfter complete addition
  3. customThe ether layer was separated
  4. extractionthe aqueous layer extracted with ethyl acetate
  5. washThe combined organic layers were washed with water, 0.1N sulfuric acid
  6. dry with materialThe organic phase was dried over magnesium sulfate
  7. filtrationfiltered
  8. customevaporated in vacuo
  9. customThe residue was purified by flash column chromatography (silica gel, DCM/ethyl acetate, 5:1)
  10. concentrationThe desired fractions were concentrated
  11. customthe residual oil was crystallized from DCM/hexane

出典と根拠

ORDレコード
ord-2ea31ed838e847d781bc94eb1500e415
出典データセット
uspto-grants-1995_06
特許番号
US05428053

関連ノート

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