Water → 9-(2-Methoxyethoxy)-9H-indeno[1,2-b]pyrazine-2,3(1H, 4H)-dione

HRID 263909

반응식

HRID 263909 반응식
[OH:1][CH:2]1[C:14]2[NH:13][C:12](=[O:15])[C:11](=[O:16])[NH:10][C:9]=2[C:8]2[CH:7]=[CH:6][CH:5]=[CH:4][C:3]1=2.[CH3:17][O:18][CH2:19][CH2:20]O.C1(C)C=CC(S(O)(=O)=O)=CC=1.O>C1C=CC=CC=1>[CH3:17][O:18][CH2:19][CH2:20][O:1][CH:2]1[C:14]2[NH:13][C:12](=[O:15])[C:11](=[O:16])[NH:10][C:9]=2[C:8]2[CH:7]=[CH:6][CH:5]=[CH:4][C:3]1=2

참가 물질

6

반응물 4

HCID 962WaterHCID 6101p-Toluenesulfonic acidHCID 80192-MethoxyethanolHCID 190359859-Hydroxy-9H-indeno[1,2-b]pyrazine-2,3(1H,4H)-dione

생성물 1

HCID 231940579-(2-Methoxyethoxy)-9H-indeno[1,2-b]pyrazine-2,3(1H, 4H)-dione수율 60%

시약·촉매·용매 1

HCID 241Benzene용매

실험 절차

A suspension of 9-hydroxy-9H-indeno[1,2-b]pyrazine-2,3(1H, 4H)-dione. 1H2O (0.50 g, 2.13 mmol) in benzene (20 ml), 2-methoxyethanol (10 ml) and p-toluensulfonic acid (20 mg) was refluxed with water separation for 20 hours. The reaction mixture was evaporated in vacuo to dryness, the residue was suspended in ethanol (10 ml) and the precipitate was filtered off and washed with ethanol and dried to give 0.48 g of the crude product, which was recrystallized from ethanol to yield 0.35 g (60%) of the title compound. M.p.>300° C. 1 -NMR (DMSO-d6, δ): 3.22 (s, 3H), 3.27-3.51 (m, 4H), 5.24 (s, 1H), 7.18 (t, 1H), 7.33 (t, 1H), 7.42 (d, 1H), 7.5 (d, 1H), 12.06 (s, 1H), 12.29 (s, 1H).

후처리

  1. customThe reaction mixture was evaporated in vacuo to dryness
  2. filtrationthe precipitate was filtered off
  3. washwashed with ethanol
  4. customdried
  5. customto give 0.48 g of the crude product, which
  6. customwas recrystallized from ethanol

출처 및 근거

ORD 기록
ord-2abaa19444a14684b82adc54b5a29b66
출처 데이터셋
uspto-grants-1997_07
특허 번호
US05646146

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