Dicyclohexylcarbodiimide → {3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanone

HRID 2388938Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2388938
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[CH:19]=[C:20]([CH:24]=[CH:25][CH:26]=3)[C:21](O)=[O:22])[CH:16]=2)[NH:11][N:10]=1.C1CCC(N=C=NC2CCCCC2)CC1.[CH3:42][N:43]1[CH2:48][CH2:47][NH:46][CH2:45][CH2:44]1>CN(C=O)C>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[CH:19]=[C:20]([C:21]([N:46]4[CH2:47][CH2:48][N:43]([CH3:42])[CH2:44][CH2:45]4)=[O:22])[CH:24]=[CH:25][CH:26]=3)[CH:16]=2)[NH:11][N:10]=1

Komponenten

5

Edukt 3

HCID 10868DicyclohexylcarbodiimideHCID 531671-MethylpiperazineHCID 178489390HCID 178489390, Verbindung

Produkt 1

HCID 178489388{3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanoneAusbeute 6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of 3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-benzoic acid (25 mg, 72 μmol) in anhydrous DMF (1.5 mL) was added PS-DCC resin (Argonaut Technologies) (180 mg, 0.22 mmol, 1.21 mmol·g−1) and N-methylpiperazine (9.6 μL, 86 μmol). The resulting mixture was stirred at 60° C. for 16 h. The resin was filtered off, washing with dichloromethane and ether and the filtrate concentrated. The residue was dissolved in dichloromethane and treated with a PS-trisamine resin (Argonaut Technologies) (20 mg). The resin was again removed by filtration and washed with dichloromethane and ether. The filtrate was concentrated and the resulting crude product was purified by reverse phase mass-triggered HPLC using a gradient of acetonitrile in water containing 0.1% of formic acid to afford {3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanone (1.7 mg, 4.0 μmol, 6% yield). 1H-NMR (500 MHz, d6-DMSO) δ8.87 (d, 1H), 8.37 (d, 1H), 8.24 (t, 1H), 8.02 (dt, 1H), 7.98 (dt, 1H), 7.68 (dd, 1H), 7.64 (t, 1H), 7.47 (ddd, 1H), 7.23 (d, 1H), 7.11 (dt, 1H), 3.86 (s, 3H). MS: m/z 346 [MH+].

Aufarbeitung

  1. filtrationThe resin was filtered off
  2. washwashing with dichloromethane and ether
  3. concentrationthe filtrate concentrated
  4. dissolutionThe residue was dissolved in dichloromethane
  5. additiontreated with a PS-trisamine resin (Argonaut Technologies) (20 mg)
  6. customThe resin was again removed by filtration
  7. washwashed with dichloromethane and ether
  8. concentrationThe filtrate was concentrated
  9. customthe resulting crude product was purified by reverse phase mass-triggered HPLC

Quellen und Nachweise

ORD-Eintrag
ord-e4924631839847d5b40c1b51ae8920f3
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08268994B2

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