Trifluoroacetic acid → N-tert-butyl-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

HRID 246392

반응식

HRID 246392 반응식
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([C:17]3[C:25]4[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH3:27])[CH:24]=4)[N:19]([CH3:28])[N:18]=3)[N:15]=2)[N:10](COCC[Si](C)(C)C)[CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(O)(C(F)(F)F)=O>ClCCl>[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([C:17]3[C:25]4[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH3:27])[CH:24]=4)[N:19]([CH3:28])[N:18]=3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

참가 물질

4

반응물 2

HCID 6422Trifluoroacetic acidHCID 71279513N-tert-butyl-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

생성물 1

HCID 71279564N-tert-butyl-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide수율 84.1%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

반응 조건

온도
25 °C

실험 절차

To a pale yellow solution of N-tert-butyl-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (40 mg, 78.6 μmol) in dichloromethane (2 mL) was added TFA (2.96 g, 2000 μL, 26.0 mmol, Eq: 330), the reaction mixture turned bright orange and was stirred at 25° C. for 3 h, then concentrated. The residue was re-dissolved in 5 mL of a solution of (dichloromethane/MeOH/ammonium hydroxide; 60:10:1) and stirred at 25° C. overnight then evaporated to a light yellow solid, dissolved in dichloromethane (containing a few drops of MeOH) and purified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco) eluting with 0 to 5% over 15 min (MeOH containing 10% ammonium hydroxide)/dichloromethane. The pure product dissolved in a small amount of dichloromethane/MeOH, added cyclohexane and some solvents evaporated to allow solid formation, which was separated by filtration and dried to give N-tert-butyl-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (25 mg, 66.1 μmol, 84.0%) as an off-white solid. MS (M+H)+=379 (>90% purity); 1H NMR (CDCl3) δ: 9.11 (s, 1H), 8.31 (d, J=3.0 Hz, 1H), 8.22 (s, 1H), 7.86 (d, J=2.3 Hz, 1H), 7.41 (d, J=9.1 Hz, 1H), 7.26 (br. s., 2H), 7.17-7.23 (m, 1H), 4.18 (s, 3H), 3.92 (s, 3H), 1.59 (s, 9H).

후처리

  1. concentrationconcentrated
  2. dissolutionThe residue was re-dissolved in 5 mL of a solution of (dichloromethane/MeOH/ammonium hydroxide; 60:10:1)
  3. stirringstirred at 25° C. overnight
  4. customthen evaporated to a light yellow solid
  5. dissolutiondissolved in dichloromethane (containing a few drops of MeOH)
  6. custompurified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco)
  7. washeluting with 0 to 5% over 15 min (MeOH containing 10% ammonium hydroxide)/dichloromethane
  8. dissolutionThe pure product dissolved in a small amount of dichloromethane/MeOH
  9. additionadded cyclohexane
  10. customsome solvents evaporated
  11. customwas separated by filtration
  12. customdried

출처 및 근거

ORD 기록
ord-14d255fe57004d9d85d1bdf7c45864a1
출처 데이터셋
uspto-grants-2014_02
특허 번호
US08658646B2

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