Trifluoroacetic acid → Ethyl 5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-2-carboxylate

HRID 909456ノート

反応式

HRID 909456 の反応式
[CH3:1][O:2][CH2:3][C@H:4]([CH3:40])[O:5][C:6]1[CH:7]=[C:8]([C:23]2[N:27](C(OC(C)(C)C)=O)[C:26]([C:35]([O:37][CH2:38][CH3:39])=[O:36])=[CH:25][CH:24]=2)[CH:9]=[C:10]([O:12][C:13]2[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][CH:14]=2)[CH:11]=1.FC(F)(F)C(O)=O>ClCCl>[CH3:1][O:2][CH2:3][C@H:4]([CH3:40])[O:5][C:6]1[CH:7]=[C:8]([C:23]2[NH:27][C:26]([C:35]([O:37][CH2:38][CH3:39])=[O:36])=[CH:25][CH:24]=2)[CH:9]=[C:10]([O:12][C:13]2[CH:14]=[CH:15][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:17][CH:18]=2)[CH:11]=1

参加物

4

反応物 2

HCID 6422Trifluoroacetic acidHCID 666830251-t-Butyl 2-ethyl 5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-1,2-dicarboxylate

生成物 1

HCID 58065515Ethyl 5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-2-carboxylate収率 81.1%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
0 °C

実験手順

1-t-Butyl 2-ethyl 5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]phenyl}-1H-pyrrole-1,2-dicarboxylate (9.44 g, 16.5 mmol) synthesized in Example (17c) was dissolved in dichloromethane (90 mL), and cooled to 0° C. Trifluoroacetic acid (45 mL) was added dropwise with stirring under nitrogen atmosphere, and stirring was carried out at room temperature for 1 hour. The solvent was distilled off under reduced pressure, followed by dilution with ethyl acetate (300 mL), a saturated aqueous sodium hydrogencarbonate solution (200 mL) was added, and the solution was separated. The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=10%-50%) to afford the desired compound (6.34 g, yield 81%) as a pale yellow solid.

後処理

  1. stirringstirring
  2. distillationThe solvent was distilled off under reduced pressure
  3. additiona saturated aqueous sodium hydrogencarbonate solution (200 mL) was added
  4. customthe solution was separated
  5. washThe organic layer was washed with saturated brine
  6. dry with materialsubsequently dried over anhydrous magnesium sulfate
  7. distillationThe solvent was distilled off under reduced pressure
  8. customthe resulting residue was purified
  9. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=10%-50%)

出典と根拠

ORDレコード
ord-1d7c3c10792e4d1d92b55774cdc48681
出典データセット
uspto-grants-2011_09
特許番号
US08017610B2

反応ノート

読み込み中…