Sodium Dithionite → HCID 178419427, Verbindung

HRID 416796

Reaktionsgleichung

Reaktionsgleichung von HRID 416796
[Br:1][C:2]1[C:3]([N:12]2[CH2:17][CH2:16][N:15]([CH2:18][C:19]3[CH:24]=[CH:23][N:22]=[CH:21][CH:20]=3)[CH2:14][CH2:13]2)=[C:4]([N+:9]([O-])=O)[C:5]([NH2:8])=[N:6][CH:7]=1.[N:25]1([CH2:31][C:32]2[CH:39]=[CH:38][C:35]([CH:36]=O)=[CH:34][CH:33]=2)[CH2:30][CH2:29][O:28][CH2:27][CH2:26]1.[O-]S(S([O-])=O)=O.[Na+].[Na+]>CCO>[Br:1][C:2]1[C:3]([N:12]2[CH2:17][CH2:16][N:15]([CH2:18][C:19]3[CH:24]=[CH:23][N:22]=[CH:21][CH:20]=3)[CH2:14][CH2:13]2)=[C:4]2[N:9]=[C:36]([C:35]3[CH:34]=[CH:33][C:32]([CH2:31][N:25]4[CH2:30][CH2:29][O:28][CH2:27][CH2:26]4)=[CH:39][CH:38]=3)[NH:8][C:5]2=[N:6][CH:7]=1

Komponenten

5

Edukt 3

HCID 24489Sodium DithioniteHCID 27954984-[(Morpholin-4-yl)methyl]benzaldehydeHCID 468683515-Bromo-3-nitro-4-(4-(pyridin-4-ylmethyl)piperazin-1-yl)pyridin-2-amine

Produkt 1

HCID 178419427HCID 178419427, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

To a mixture of 5-bromo-3-nitro-4-(4-pyridin-4-ylmethyl-piperazin-1-yl)-pyridin-2-ylamine (0.050 g, 0.13 mmol) and EtOH (4.5 ml) was added 4-morpholin-4-ylmethyl-benzaldehyde (0.032 g, 0.16 mmol) followed by a freshly prepared aqueous solution of Na2S2O4 (1M; 0.50 ml, 0.50 mmol). The reaction mixture was stirred at 70° C. for 9 h, then allowed to cool to room temperature and concentrated in vacuo. The residue was absorbed on silica gel, the free-running powder was placed on a 10 g isolute silica column and elution with a gradient of methanol (0 to 15%) in ethyl acetate/dichloromethane (v:v; 4:1). afforded a yellow solid. This material was triturated with diethyl ether, and the pale yellow precipitate was collected by filtration, successively washed with diethyl ether, water, and diethyl, then dried in vacuo (0.002 g, 3%). 1H-NMR (500 MHz, DMSO-d6) 2.38 (br s, 4H) and 3.59 (t, J=5.0 Hz, 4H) (morpholine protons), 2.63 (br s, 4H, piperazine N(CH2)2), 3.69 (br s, 4H, piperazine N(CH2)2), 3.54 (s, 2H) and 3.62 (s, 2H) (NCH2-pyridyl and C6H4CH2), 7.40 (d, J=4.9 Hz, 2H pyridine 3-H and 5-H), 7.48 (d, J=8.2 Hz, 2H) and 8.14 (d, J=8.2 Hz, 2H) (3,5-C6H4— and 2,6-C6H4—), 8.24 (s, 1H, imidazo[4,5-b]pyridine 5-H), 8.54 (d, J=5.5 Hz, 2H, pyridine 2-H and 6-H), 13.48 (br s, 1H, imidazo[4,5-b]pyridine N—H);

Aufarbeitung

  1. temperatureto cool to room temperature
  2. concentrationconcentrated in vacuo
  3. customThe residue was absorbed on silica gel
  4. washthe free-running powder was placed on a 10 g isolute silica column and elution with a gradient of methanol (0 to 15%) in ethyl acetate/dichloromethane (v:v; 4:1)
  5. customafforded a yellow solid
  6. customThis material was triturated with diethyl ether
  7. filtrationthe pale yellow precipitate was collected by filtration
  8. washsuccessively washed with diethyl ether, water, and diethyl
  9. customdried in vacuo (0.002 g, 3%)

Quellen und Nachweise

ORD-Eintrag
ord-4e316f871eb34a38bc18ccf81c9fa627
Quelldatensatz
uspto-grants-2012_01
Patentnummer
US08088761B2

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