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

HRID 2088936

Reaction equation

HRID 2088936 reaction equation
[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

Participants

6

Reactant 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, compound

Product 1

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

Conditions

Temperature
0 °C

Procedure

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]+.

Workup

  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

Sources & evidence

ORD record
ord-a90feec47fa34ccaa44c7d060d23aae6
Source dataset
uspto-grants-2013_05
Patent number
US08436002B2

Linked notes

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