Stannous Chloride → 6-amino-1-[2-(trimethyl-silanyl)-ethoxymethyl]-3-{1-[2-(trimethyl-silanyl)ethoxymethyl]-1-H-benzoimidazol-2-yl}-1-H-indazole

HRID 1861090Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1861090
[Sn](Cl)Cl.[N+:4]([C:7]1[CH:15]=[C:14]2[C:10]([C:11]([C:24]3[N:28]([CH2:29][O:30][CH2:31][CH2:32][Si:33]([CH3:36])([CH3:35])[CH3:34])[C:27]4[CH:37]=[CH:38][CH:39]=[CH:40][C:26]=4[N:25]=3)=[N:12][N:13]2[CH2:16][O:17][CH2:18][CH2:19][Si:20]([CH3:23])([CH3:22])[CH3:21])=[CH:9][CH:8]=1)([O-])=O.C(=O)(O)[O-].[Na+]>CN(C=O)C.O>[NH2:4][C:7]1[CH:15]=[C:14]2[C:10]([C:11]([C:24]3[N:28]([CH2:29][O:30][CH2:31][CH2:32][Si:33]([CH3:35])([CH3:34])[CH3:36])[C:27]4[CH:37]=[CH:38][CH:39]=[CH:40][C:26]=4[N:25]=3)=[N:12][N:13]2[CH2:16][O:17][CH2:18][CH2:19][Si:20]([CH3:23])([CH3:22])[CH3:21])=[CH:9][CH:8]=1

Komponenten

5

Edukt 3

HCID 24479Stannous ChlorideHCID 516892Sodium BicarbonateHCID 229806876-nitro-1-[2-(trimethyl-silanyl)ethoxymethyl]-3-{1-[2-(trimethyl-silanyl)-ethoxymethyl]-1-H-benzoimidazol-2-yl}-1-H-indazole

Produkt 1

HCID 229806486-amino-1-[2-(trimethyl-silanyl)-ethoxymethyl]-3-{1-[2-(trimethyl-silanyl)ethoxymethyl]-1-H-benzoimidazol-2-yl}-1-H-indazoleAusbeute 89,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 21962138N,N-Dimethylformamide--water (1/1)Lösungsmittel

Reaktionsbedingungen

Temperatur
50 °C

Versuchsvorschrift

Tin(II) chloride (12.0 g, 63.3 mmol) was added to a solution of 6-nitro-1-[2-(trimethyl-silanyl)-ethoxymethyl]-3-{1-[2-(trimethyl-silanyl)-ethoxymethyl]-1-H-benzoimidazol-2-yl}-1-H-indazole (7.18 g, 13.3 mmol) in DMF/H2O (160 mL/10 mL), and the reaction stirred at 50° C. for 2.5 h. The reaction was cooled to 0° C., and saturated sodium bicarbonate was added slowly, with mixing, until all frothing from quenching had subsided. The material was concentrated in vacuo and taken up in ether (100 mL). Insoluble material was removed by filtration and rinsed with ether (50 mL). The filtrate was washed with brine (50 mL), dried (Na2SO4), and concentrated in vacui. Purification by silica gel chromatography (25% ethyl acetate/hexane) gave 6.05 g (89%) of 6-amino-1-[2-(trimethyl-silanyl)-ethoxymethyl]-3-{1-[2-(trimethyl-silanyl)-ethoxymethyl]-1-H-benzoimidazol-2-yl}-1-H-indazole as a faintly yellow waxy solid. 1H NMR (300 MHz, CDCl3) δ 8.40 (d, 1H, J=9.0 Hz), 7.89-7.86 (m, 1H), 7.63-7.60 (m, 1H), 7.35-7.31 (m, 2H), 6.78 (dd, 1H, J=8.7, 1.8 Hz), 6.75 (s, 1H), 6.25 (s, 2H), 5.69 (s, 2H), 3.93 (br s, 2H), 3.65-3.55 (m, 4H), 0.93 (t, 2H, J=8.1 Hz), 0.85 (t, 2H, J=8.1 Hz), −0.04 (s, 9H), −0.15 (s, 9H). Anal. (C26H39N5O2Si2) C, H, N. Calculated: C, 61.26; H, 7.71; N, 13.74. Found: C, 61.18; H, 7.65; N, 13.82.

Aufarbeitung

  1. temperatureThe reaction was cooled to 0° C.
  2. additionwith mixing, until all frothing
  3. customfrom quenching
  4. concentrationThe material was concentrated in vacuo
  5. customInsoluble material was removed by filtration
  6. washrinsed with ether (50 mL)
  7. washThe filtrate was washed with brine (50 mL)
  8. dry with materialdried (Na2SO4)
  9. concentrationconcentrated in vacui
  10. customPurification by silica gel chromatography (25% ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-270e218d4ac94e2085025952b77d8b13
Quelldatensatz
uspto-grants-2003_03
Patentnummer
US06531491B1

Notizen zur Reaktion

Wird geladen…