Potassium Carbonate → HCID 178526673, compound

HRID 895663Notes

Reaction equation

HRID 895663 reaction equation
Cl.Cl.[NH:3]1[C:11]2[CH2:10][CH2:9][NH:8][CH2:7][C:6]=2[N:5]=[CH:4]1.Cl[C:13]1[C:18]([N+:19]([O-:21])=[O:20])=[CH:17][CH:16]=[CH:15][N:14]=1.C([O-])([O-])=O.[K+].[K+]>CN(C=O)C>[N+:19]([C:18]1[C:13]([N:8]2[CH2:9][CH2:10][C:11]3[NH:3][CH:4]=[N:5][C:6]=3[CH2:7]2)=[N:14][CH:15]=[CH:16][CH:17]=1)([O-:21])=[O:20]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 796132-Chloro-3-nitropyridineHCID 164180044,5,6,7-Tetrahydro-3H-imidazo[4,5-c]pyridine--hydrogen chloride (1/2)

Product 1

HCID 178526673HCID 178526673, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A mixture of 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine dihydrochloride (2.0 g, 12.5 mmol; prepared essentially as described by Habermehl, E., Heterocycles 5:127,133 (1976)), 2-chloro-3-nitropyridine (1.7 g, 11.25 mmol) and K2CO3 (5.2 g, 37.5 mmol) in 25 mL of DMF is heated at 50° C. for 4 hours and then allowed to cool to room temperature. The mixture is then partitioned between ethyl acetate and water and the layers are separated. The aqueous layer is then further extracted with ethyl acetate and the combined organic extracts are dried over Na2SO4, filtered and the solvents removed under reduced pressure. Column chromatography of the residue on silica gel (5% MeOH in CH2Cl2 as eluent) gives 5-(3-nitro-pyridin-2-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine as a yellow solid (1.5 g). 1H NMR δ (CDCl3): 8.34 (d, 1H), 8.16 (dd, 1H), 7.53(s, 1H), 6.74 (q, 1H), 4.31 (s, 2H), 3.94(t, 2H) and 2.91(t, 2H). MS: 246.3 (m+1).

Workup

  1. customprepared essentially
  2. customThe mixture is then partitioned between ethyl acetate and water
  3. customthe layers are separated
  4. extractionThe aqueous layer is then further extracted with ethyl acetate
  5. dry with materialthe combined organic extracts are dried over Na2SO4
  6. filtrationfiltered
  7. customthe solvents removed under reduced pressure

Sources & evidence

ORD record
ord-2709eb236d904e1ea4c490b69cbe68cd
Source dataset
uspto-grants-2005_07
Patent number
US06916827B2

Reaction notes

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