Cesium carbonate → {3-[3-(2-cyano-benzyl)-5-ethyl-4-oxo-4,5-dihydro-3H-imidazo[4,5-c]pyridin-2-yl]-cyclohexyl}-carbamic acid benzyl ester

HRID 1376220Notes

Reaction equation

HRID 1376220 reaction equation
[CH2:1]([O:8][C:9](=[O:29])[NH:10][CH:11]1[CH2:16][CH2:15][CH2:14][CH:13]([C:17]2[NH:28][C:20]3[C:21](=[O:27])[N:22]([CH2:25][CH3:26])[CH:23]=[CH:24][C:19]=3[N:18]=2)[CH2:12]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])([O-])=O.[Cs+].[Cs+].[C:36]([C:38]1[CH:45]=[CH:44][CH:43]=[CH:42][C:39]=1[CH2:40]Br)#[N:37]>CN(C=O)C.O>[CH2:1]([O:8][C:9](=[O:29])[NH:10][CH:11]1[CH2:16][CH2:15][CH2:14][CH:13]([C:17]2[N:28]([CH2:40][C:39]3[CH:42]=[CH:43][CH:44]=[CH:45][C:38]=3[C:36]#[N:37])[C:20]3[C:21](=[O:27])[N:22]([CH2:25][CH3:26])[CH:23]=[CH:24][C:19]=3[N:18]=2)[CH2:12]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 895992-(Bromomethyl)benzonitrileHCID 178462502HCID 178462502, compound

Product 1

HCID 58788436{3-[3-(2-cyano-benzyl)-5-ethyl-4-oxo-4,5-dihydro-3H-imidazo[4,5-c]pyridin-2-yl]-cyclohexyl}-carbamic acid benzyl esterYield 54.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of [3-(5-ethyl-4-oxo-4,5-dihydro-3H-imidazo[4,5-c]pyridin-2-yl)-cyclohexyl]-carbamic acid benzyl ester (0.1 g, 0.25 mmol) in DMF (3 mL) were added Cs2CO3 (0.17 g, 0.51 mmol) and 60 mg (0.30 mmol) of 2-cyanobenzyl bromide as a solution in 3 mL of DMF. After stirring at room temperature for 17 h, the reaction mixture was diluted with water (10 mL) then extracted with CH2Cl2. The combined extracts were dried with MgSO4, and concentrated in vacuo. The crude product was purified by flash chromatography, eluting with 1% MeOH in CH2Cl2 to give {3-[3-(2-cyano-benzyl)-5-ethyl-4-oxo-4,5-dihydro-3H-imidazo[4,5-c]pyridin-2-yl]-cyclohexyl}-carbamic acid benzyl ester (70 mg, 54% yield). 1H-NMR (CDCl3): δ 7.73 (m, 1H), 7.49 (m, 1H), 7.34 (m, 6H), 7.13 (m, 1H), 6.89 (d, 1H, J=8.4 Hz), 6.69 (m, 1H), 6.19 (m, 1H), 5.94 (m, 1H), 5.06 (s, 2H), 4.73 (m, 1H), 4.07 (m, 2H), 3.58 (m, 1H), 2.79 (m, 1H), 2.02 (m, 2H), 1.87 (m, 1H), 1.68 (m, 2H), 1.51 (m, 2H), 1.38 (t, 3H, J=7.2 Hz), 1.16 (m, 1H). MS: calculated for C30H31N5O3+H 510.3; found: 510.5.

Workup

  1. extractionthen extracted with CH2Cl2
  2. dry with materialThe combined extracts were dried with MgSO4
  3. concentrationconcentrated in vacuo
  4. customThe crude product was purified by flash chromatography
  5. washeluting with 1% MeOH in CH2Cl2

Sources & evidence

ORD record
ord-b2a9e45911a142c183835065f738715c
Source dataset
uspto-grants-2007_01
Patent number
US07169926B1

Reaction notes

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