N-Fluorobenzenesulfonimide → 1,3-Dioxo-2-(2,6-dioxo-3-fluoropiperidin-3-yl)isoindoline

HRID 363432ノート

反応式

HRID 363432 の反応式
[O:1]=[C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4](=[O:11])[N:3]1[CH:12]1[CH2:17][CH2:16][C:15](=[O:18])[N:14](C(OC(C)(C)C)=O)[C:13]1=[O:26].C([Li])CCC.C1C=CC(S(N(S(C2C=CC=CC=2)(=O)=O)[F:42])(=O)=O)=CC=1>O1CCCC1>[O:1]=[C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4](=[O:11])[N:3]1[C:12]1([F:42])[CH2:17][CH2:16][C:15](=[O:18])[NH:14][C:13]1=[O:26]

参加物

5

反応物 3

HCID 588007N-FluorobenzenesulfonimideHCID 15408802Tert-butyl 3-(1,3-dioxoisoindolin-2-yl)-2,6-dioxopiperidine-1-carboxylateHCID 178418339Butyllithium

生成物 1

HCID 98820501,3-Dioxo-2-(2,6-dioxo-3-fluoropiperidin-3-yl)isoindoline

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a stirred solution of 1,3-dioxo-2-(1-tert.-butoxycarbonyl-2,6-dioxopiperidin-3-yl)isoindoline (1.0 g, 2.8 mmol) in tetrahydrofuran (10 mL) is added n-butyl lithium (1.2 mL, 3.0 mmol, 2.5M) at -78° C. After 20 minutes, N-fluorobenzenesulfonimide (0-8 g, 3.2 mmol) is added to the mixture. The mixture is allowed to reach room temperature and the solvent then removed in vacuo. The residue is stirred with ethyl acetate (10 mL) and IN hydrochloric acid (10 mL) for one hour. The organic layer is separated and the solvent removed in vacuo to yield 1,3-dioxo-2-(2,6-dioxo-3-fluoropiperidin-3-yl)isoindoline which can be further purified through chromatography.

後処理

  1. customto reach room temperature
  2. customthe solvent then removed in vacuo
  3. customThe organic layer is separated
  4. customthe solvent removed in vacuo

出典と根拠

ORDレコード
ord-63b5690f28f14fa6b275320be00951d9
出典データセット
uspto-grants-1999_02
特許番号
US05874448

反応ノート

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