Water → 8-(3,5-Dimethoxy-phenyl)-quinoxaline-5-carboxylic acid [5-(4-ethyl-piperazin-1-ylmethyl)-pyridin-2-yl]-amide

HRID 43154Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 43154
C[Al](C)C.C([O:7][C:8]([C:10]1[C:11]2[N:12]=[CH:13][CH:14]=[N:15][C:16]=2[C:17]([C:20]2[CH:25]=[C:24]([O:26][CH3:27])[CH:23]=[C:22]([O:28][CH3:29])[CH:21]=2)=[CH:18][CH:19]=1)=O)C.[CH2:30]([N:32]1[CH2:37][CH2:36][N:35]([CH2:38][C:39]2[CH:40]=[CH:41][C:42]([NH2:45])=[N:43][CH:44]=2)[CH2:34][CH2:33]1)[CH3:31].O>C1(C)C=CC=CC=1>[CH2:30]([N:32]1[CH2:33][CH2:34][N:35]([CH2:38][C:39]2[CH:40]=[CH:41][C:42]([NH:45][C:8]([C:10]3[C:11]4[N:12]=[CH:13][CH:14]=[N:15][C:16]=4[C:17]([C:20]4[CH:21]=[C:22]([O:28][CH3:29])[CH:23]=[C:24]([O:26][CH3:27])[CH:25]=4)=[CH:18][CH:19]=3)=[O:7])=[N:43][CH:44]=2)[CH2:36][CH2:37]1)[CH3:31]

Komponenten

6

Edukt 4

HCID 962WaterHCID 16682925TrimethylaluminumHCID 454899105-[(4-Ethyl-1-piperazinyl)methyl]-2-pyridinamineHCID 669146908-(3,5-Dimethoxy-phenyl)-quinoxaline-5-carboxylic acid ethyl ester

Produkt 1

HCID 592929588-(3,5-Dimethoxy-phenyl)-quinoxaline-5-carboxylic acid [5-(4-ethyl-piperazin-1-ylmethyl)-pyridin-2-yl]-amideAusbeute 35,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

Trimethyl aluminum (2 M in toluene, 0.37 mL, 0.74 mmol, 2.5 equiv) was added to a mixture of 8-(3,5-dimethoxy-phenyl)-quinoxaline-5-carboxylic acid ethyl ester (Step 115.1) (100 mg, 0.30 mmol) and 5-(4-ethyl-piperazin-1-ylmethyl)-pyridin-2-ylamine (Step 26.1; purified by column chromatography) (78 mg, 0.36 mmol, 1.2 equiv) in toluene (2 mL). The reaction mixture was stirred for 1 h at rt, heated to reflux, stirred for 3 h, allowed to cool, poured onto EtOAc and H2O, and filtered through a pad of celite. The filtrate was extracted with EtOAc. The organic phase was washed with H2O and brine, dried (Na2SO4), filtered and concentrated. The residue was purified by silica gel column chromatography (DCM/MeOH/NH3aq, 94:5:1) followed by reverse-phase preparative HPLC to afford 54 mg of the title compound as a pale yellow solid. Title compound: ESI-MS: 513.2 [M+H]+; tR=3.54 min (System 1); TLC: Rf=0.29 (DCM/MeOH/NH3aq, 94:5:1).

Aufarbeitung

  1. temperatureheated
  2. temperatureto reflux
  3. stirringstirred for 3 h
  4. temperatureto cool
  5. filtrationfiltered through a pad of celite
  6. extractionThe filtrate was extracted with EtOAc
  7. washThe organic phase was washed with H2O and brine
  8. dry with materialdried (Na2SO4)
  9. filtrationfiltered
  10. concentrationconcentrated
  11. customThe residue was purified by silica gel column chromatography (DCM/MeOH/NH3aq, 94:5:1)

Quellen und Nachweise

ORD-Eintrag
ord-33d127c707d948e392fb565b48665bab
Quelldatensatz
uspto-grants-2013_09
Patentnummer
US08536175B2

Notizen zur Reaktion

Wird geladen…