2-Methyltetrahydrofuran → Tert-butyl 4-[4-iodo-1-(2-pyrrolidin-1-ylethyl)imidazol-2-yl]piperidine-1-carboxylate

HRID 2088936

Reaktionsgleichung

Reaktionsgleichung von HRID 2088936
[I:1][C:2]1[N:3]=[C:4]([CH:15]2[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[N:5]([CH2:8][CH2:9][N:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)[C:6]=1I.CC1CCCO1.C([Mg]Cl)(C)C.O1CCCC1.[Cl-].[NH4+]>>[I:1][C:2]1[N:3]=[C:4]([CH:15]2[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[N:5]([CH2:8][CH2:9][N:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)[CH:6]=1

Komponenten

6

Edukt 5

HCID 73012-MethyltetrahydrofuranHCID 8028TetrahydrofuranHCID 25517Ammonium ChlorideHCID 67112102Tert-butyl 4-[4,5-diiodo-1-(2-pyrrolidin-1-ylethyl)imidazol-2-yl]piperidine-1-carboxylateHCID 178418918HCID 178418918, Verbindung

Produkt 1

HCID 67112018Tert-butyl 4-[4-iodo-1-(2-pyrrolidin-1-ylethyl)imidazol-2-yl]piperidine-1-carboxylateAusbeute 98 %

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Combine tert-butyl 4-(4,5-diiodo-1-(2-(pyrrolidin-1-yl)ethyl)-1H-imidazol-2-yl)piperidine-1-carboxylate (51.00 g, 84.96 mmol) and 2-methyltetrahydrofuran (357 mL). Cool the reaction mixture to 0° C. Add 2 M isopropylmagnesium chloride in tetrahydrofuran (55.22 mL, 1.3 eq) dropwise over 45 minutes, maintaining the temperature below 5° C. Add saturated aqueous ammonium chloride. Separate the layers. Wash the aqueous phase with methyl tert-butyl ether. Wash the organics with aqueous saturated sodium chloride. Dry the organics over anhydrous magnesium sulfate, decolor with charcoal, filter, and concentrate in vacuo to give tert-butyl 4-(4-iodo-1-(2-(pyrrolidin-1-yl)ethyl)-1H-imidazol-2-yl)piperidine-1-carboxylate as a yellow solid (39.50 g, 98%). MS (ES) m/z=475 [M]+.

Aufarbeitung

  1. temperaturemaintaining the temperature below 5° C
  2. customSeparate the layers
  3. washWash the aqueous phase with methyl tert-butyl ether
  4. washWash the organics with aqueous saturated sodium chloride
  5. dry with materialDry the organics over anhydrous magnesium sulfate, decolor with charcoal
  6. filtrationfilter
  7. concentrationconcentrate in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-a90feec47fa34ccaa44c7d060d23aae6
Quelldatensatz
uspto-grants-2013_05
Patentnummer
US08436002B2

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