Tetrahydrofuran → 1-(Isoquinolin-3-yl)ethan-1-one

HRID 931

反応式

HRID 931 の反応式
[CH3:1][Mg]Cl.[CH:4]1[C:13]2C(=[CH:9][CH:10]=[CH:11][CH:12]=2)C=C(C#N)[N:5]=1.[CH2:16]1[CH2:20][O:19][CH2:18][CH2:17]1>>[C:18]([C:17]1[N:5]=[CH:4][C:13]2[C:20]([CH:16]=1)=[CH:9][CH:10]=[CH:11][CH:12]=2)(=[O:19])[CH3:1]

参加物

4

反応物 3

HCID 8028TetrahydrofuranHCID 50768083-IsoquinolinecarbonitrileHCID 178418332HCID 178418332、化合物

生成物 1

HCID 112752751-(Isoquinolin-3-yl)ethan-1-one収率 14%

実験手順

Methyl magnesium chloride (2.6 ml of a 3.0M solution in THF) was added dropwise to a solution of isoquinoline-3-carbonitrile at 0°-5° C. After the addition the reaction mixture was stirred at room temperature for 1 hour, then quenched with water. Hydrochloric acid (2M aqueous solution) was added to the reaction mixture until the aqueous phase was pH2. After stirring for 30 minutes the aqueous was neutralised with sodium bicarbonate (solid) and extracted with ether (×2). The combined extracts were washed with water, dried and concentrated to give a crystalline solid. Recrystalisation from hexane gave 3-acetyl-isoquinoline (0.55 g, 14% yield) as a pale yellow solid m.p. 84.4°-86.8° C. 1H NMR: 2.83(3H,s); 7.69-7.81(2H,m); 7.99(1H,m); 8.04(1H,m); 8.49(1H,m); 9.29(1H,s) ppm.

後処理

  1. additionAfter the addition the reaction mixture
  2. customquenched with water
  3. additionHydrochloric acid (2M aqueous solution) was added to the reaction mixture until the aqueous phase
  4. stirringAfter stirring for 30 minutes the
  5. extractionextracted with ether (×2)
  6. washThe combined extracts were washed with water
  7. customdried
  8. concentrationconcentrated
  9. customto give a crystalline solid
  10. customRecrystalisation from hexane

出典と根拠

ORDレコード
ord-1933fe9b9be74b32bfee65861da57c2d
出典データセット
uspto-grants-1998_03
特許番号
US05723473

関連ノート

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