Succinic anhydride → 4-oxo-4-(1-phenyl-3,4-dihydropyrrolo[1,2-a]pyrazin-2(1H)-yl)butanoic acid

HRID 909253노트

반응식

HRID 909253 반응식
[C:1]1([CH:7]2[NH:12][CH2:11][CH2:10][N:9]3[CH:13]=[CH:14][CH:15]=[C:8]23)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CCN(CC)CC.[C:23]1(=[O:29])[O:28][C:26](=[O:27])[CH2:25][CH2:24]1.CC(=O)OCC.CO>CC#N.CC(=O)OCC>[O:29]=[C:23]([N:12]1[CH2:11][CH2:10][N:9]2[CH:13]=[CH:14][CH:15]=[C:8]2[CH:7]1[C:1]1[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1)[CH2:24][CH2:25][C:26]([OH:28])=[O:27]

참가 물질

7

반응물 4

HCID 7922Succinic anhydrideHCID 8471TriethylamineHCID 27709101-phenyl-1H,2H,3H,4H-pyrrolo(1,2-a)pyrazineHCID 21584119Ethylacetate methanol

생성물 1

HCID 427793334-oxo-4-(1-phenyl-3,4-dihydropyrrolo[1,2-a]pyrazin-2(1H)-yl)butanoic acid수율 44%

시약·촉매·용매 2

HCID 6342Acetonitrile용매HCID 8857Ethyl Acetate용매

실험 절차

1-Phenyl-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine (A2) (396 mg, 2.0 mmol) and NEt3 (277 μl, 2.0 mmol) were added to a suspension of succinic anhydride (176 mg, 1.76 mmol) in MeCN (28 ml), and stirring was carried out for 16 h at RT. The mixture was then diluted with EA (30 ml) and washed with 2N hydrochloric acid (2×5 ml). The organic phase was dried over MgSO4, filtered and concentrated in vacuo. The resulting residue was taken up in EA (50 ml) and again washed with 2N hydrochloric acid (20 ml) and then with a sat. aq. sodium carbonate solution (2×30 ml). The organic phase was again dried over MgSO4, filtered and concentrated in vacuo. CC (EA/MeOH 3:1) with the residue yielded 230 mg (0.77 mmol, 44%) of 4-oxo-4-(1-phenyl-3,4-dihydropyrrolo[1,2-a]pyrazin-2(1H)-yl)butanoic acid (S3).

후처리

  1. washwashed with 2N hydrochloric acid (2×5 ml)
  2. dry with materialThe organic phase was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. washagain washed with 2N hydrochloric acid (20 ml)
  6. dry with materialThe organic phase was again dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-471bfbf9f1d94d26aafab6e253d4ad81
출처 데이터셋
uspto-grants-2011_09
특허 번호
US08017772B2

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