Trifluoromethanesulfonic acid → 2,3-dihydrospiro[furo[2,3-g][1,4]-benzodioxine-8,8'-[1,3]thiazolo[5,4-e]indol]-7'(6'H)-one

HRID 2385220ノート

反応式

HRID 2385220 の反応式
COC1C=CC(C[N:8]2[C:16]3[C:11](=[C:12]4[S:19][CH:18]=[N:17][C:13]4=[CH:14][CH:15]=3)[C:10]3([C:31]4[C:22](=[CH:23][C:24]5[O:29][CH2:28][CH2:27][O:26][C:25]=5[CH:30]=4)[O:21][CH2:20]3)[C:9]2=[O:32])=CC=1.FC(F)(F)S(O)(=O)=O>ClCCl.FC(F)(F)C(O)=O>[S:19]1[C:12]2=[C:11]3[C:16](=[CH:15][CH:14]=[C:13]2[N:17]=[CH:18]1)[NH:8][C:9](=[O:32])[C:10]13[C:31]2[C:22](=[CH:23][C:24]3[O:29][CH2:28][CH2:27][O:26][C:25]=3[CH:30]=2)[O:21][CH2:20]1

参加物

5

反応物 2

HCID 62406Trifluoromethanesulfonic acidHCID 593523706'-(4-methoxybenzyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,8'-[1,3]thiazolo[5,4-e]indol]-7'(6'H)-one

生成物 1

HCID 593523112,3-dihydrospiro[furo[2,3-g][1,4]-benzodioxine-8,8'-[1,3]thiazolo[5,4-e]indol]-7'(6'H)-one収率 46.1%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 6422Trifluoroacetic acid溶媒

実験手順

To a solution of 6′-(4-methoxybenzyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,8′-[1,3]thiazolo[5,4-e]indol]-7′(6′H)-one (1.9 g, 4.0 mmol) in dichloromethane (40 mL) and trifluoroacetic acid (40 mL) was added at ambient temperature trifluoromethanesulfonic acid (1.8 mL, 20 mmol). The mixture was stirred at ambient temperature for 16 h and concentrated in vacuo. Water was added to the residue and the mixture was extracted with ethyl acetate. The combined organic extracts were washed with saturated aqueous sodium bicarbonate and water, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by column chromatography and eluted with 50% ethyl acetate in hexanes to afford 2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,8′-[1,3]thiazolo[5,4-e]indol]-7′(6′H)-one (0.65 g, 44%): 1H NMR (300 MHz, CDCl3) δ10.86 (s, 1H), 9.06 (s, 1H), 7.97 (d, J=8.5 Hz, 1H), 7.14 (d, J=8.5 Hz, 1H), 6.54 (s, 1H), 6.21 (s, 1H), 4.68 (s, 2H), 4.19-4.01 (m, 4H); MS (ES+) m/z 353.1 (M+1).

後処理

  1. concentrationconcentrated in vacuo
  2. additionWater was added to the residue
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe combined organic extracts were washed with saturated aqueous sodium bicarbonate and water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by column chromatography
  9. washeluted with 50% ethyl acetate in hexanes

出典と根拠

ORDレコード
ord-c9b6feb6d33249efa9ce4609b89d3575
出典データセット
uspto-grants-2012_09
特許番号
US08263606B2

反応ノート

読み込み中…