3H-Pyrazol-3-one, 2,4-dihydro-2,5-dimethyl- → 4-isopropyl-6-methoxy-2-(1,3-dimethylpyrazol-5-yl-oxymethyl)-1,2-benzisothiazol-3(2H)-one 1,1-dioxide

HRID 1289823ノート

反応式

HRID 1289823 の反応式
[CH3:1][N:2]1[C:6](=[O:7])[CH2:5][C:4]([CH3:8])=[N:3]1.[F-].[K+].Cl[CH2:12][N:13]1[C:17](=[O:18])[C:16]2[C:19]([CH:25]([CH3:27])[CH3:26])=[CH:20][C:21]([O:23][CH3:24])=[CH:22][C:15]=2[S:14]1(=[O:29])=[O:28]>CN(C=O)C>[CH:25]([C:19]1[C:16]2[C:17](=[O:18])[N:13]([CH2:12][O:7][C:6]3[N:2]([CH3:1])[N:3]=[C:4]([CH3:8])[CH:5]=3)[S:14](=[O:29])(=[O:28])[C:15]=2[CH:22]=[C:21]([O:23][CH3:24])[CH:20]=1)([CH3:27])[CH3:26]

参加物

5

反応物 3

HCID 176733H-Pyrazol-3-one, 2,4-dihydro-2,5-dimethyl-HCID 522689Potassium FluorideHCID 99951732-(Chloromethyl)-4-isopropyl-6-methoxybenzo[D]isothiazol-3(2H)-one 1,1-dioxide

生成物 1

HCID 189225454-isopropyl-6-methoxy-2-(1,3-dimethylpyrazol-5-yl-oxymethyl)-1,2-benzisothiazol-3(2H)-one 1,1-dioxide収率 37%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a solution of 2,4-dihydro-2,5-dimethyl-3H-pyrazol-3-one (475 mg; 4.24 mmol) in DMF (25 ml) was added 280 mg (4.83 mmol) of KF followed by 2-chloromethyl-4-isopropyl-6-methoxy-1,2-benzisothiazol-3(2H)-one 1,1-dioxide (1 g, 3.3 mmol), and the resulting mixture was stirred at room temperature for 24 hours and then was poured into ice/water. The above mixture was extracted with ethyl acetate and the organic layer was washed with water, dried, and concentrated in vacuo. The residue was purified by flash chromatography to afford 0.46 g (37%) of 4-isopropyl-6-methoxy-2-(1,3-dimethylpyrazol-5-yl-oxymethyl)-1,2-benzisothiazol-3(2H)-one 1,1-dioxide (Formula I: R1 =R2 =CH3 ; R3 =H; R4 =CH(CH3)2 ; R5 =6-OCH3) as a white solid, m.p. 146°-147° C.

後処理

  1. extractionThe above mixture was extracted with ethyl acetate
  2. washthe organic layer was washed with water
  3. customdried
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by flash chromatography

出典と根拠

ORDレコード
ord-0325d04e602d45639edf762f2127e922
出典データセット
uspto-grants-1998_05
特許番号
US05750550

反応ノート

読み込み中…