Sodium hydride → 1-ethyl-7-methyl-3-(4-{[tris(1-methylethyl)silyl]oxy}phenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

HRID 1430056Notes

Reaction equation

HRID 1430056 reaction equation
[CH:1]([Si:4](Cl)([CH:8]([CH3:10])[CH3:9])[CH:5]([CH3:7])[CH3:6])([CH3:3])[CH3:2].[CH2:12]([N:14]1[C:22]2[C:17](=[N:18][CH:19]=[CH:20][C:21]=2[CH3:23])[N:16]([C:24]2[CH:29]=[CH:28][C:27]([OH:30])=[CH:26][CH:25]=2)[C:15]1=[O:31])[CH3:13].[H-].[Na+].[Cl-].[Cl-].[Ca+2].C([O-])(O)=O.[Na+]>CN(C=O)C>[CH2:12]([N:14]1[C:22]2[C:17](=[N:18][CH:19]=[CH:20][C:21]=2[CH3:23])[N:16]([C:24]2[CH:29]=[CH:28][C:27]([O:30][Si:4]([CH:8]([CH3:10])[CH3:9])([CH:5]([CH3:7])[CH3:6])[CH:1]([CH3:3])[CH3:2])=[CH:26][CH:25]=2)[C:15]1=[O:31])[CH3:13]

Participants

7

Reactant 5

HCID 24758Sodium hydrideHCID 139400Triisopropylsilyl chlorideHCID 516892Sodium BicarbonateHCID 5284359Calcium ChlorideHCID 58577432HCID 58577432, compound

Product 1

HCID 585775691-ethyl-7-methyl-3-(4-{[tris(1-methylethyl)silyl]oxy}phenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Triisopropylsilyl chloride (2.384 mL) was added to a solution of 1-ethyl-3-(4-hydroxyphenyl)-7-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (2 g) and NaH (0.594 g) in DMF (20 mL) at 20° C. The mixture was stirred at 20° C. under a dry atmosphere (CaCl2 tube) for 1 h. The mixture was poured into sat. NaHCO3 at 0° C. and extracted with EtOAc. The organic layer was separated, washed with water and brine, dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography (NH silica gel, eluted with 0%-25% EtOAc in hexane) to give 1-ethyl-7-methyl-3-(4-{[tris(1-methylethyl)silyl]oxy}phenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (4.0 g) as light brown crystals.

Workup

  1. extractionextracted with EtOAc
  2. customThe organic layer was separated
  3. washwashed with water and brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by column chromatography (NH silica gel, eluted with 0%-25% EtOAc in hexane)

Sources & evidence

ORD record
ord-4756c537c11e4d7bb00641820907d21c
Source dataset
uspto-grants-2015_01
Patent number
US08940758B2

Reaction notes

Loading…