Dimethylformamide → N-{[1-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-1H-benzimidazol-2-yl]methyl}-2-(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)-N-methylacetamide

HRID 1428404Notes

Reaction equation

HRID 1428404 reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[CH2:10][N:11]([CH3:26])[C:12](=[O:25])[CH2:13][N:14]1[C:18]2[CH:19]=[C:20]([Cl:23])[CH:21]=[CH:22][C:17]=2[S:16][C:15]1=[O:24].CN(C=O)C.Br[CH2:33][CH2:34][O:35][Si:36]([C:39]([CH3:42])([CH3:41])[CH3:40])([CH3:38])[CH3:37].C([O-])([O-])=O.[K+].[K+]>CCOC(C)=O>[Si:36]([O:35][CH2:34][CH2:33][N:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[CH2:10][N:11]([CH3:26])[C:12](=[O:25])[CH2:13][N:14]1[C:18]2[CH:19]=[C:20]([Cl:23])[CH:21]=[CH:22][C:17]=2[S:16][C:15]1=[O:24])([C:39]([CH3:42])([CH3:41])[CH3:40])([CH3:38])[CH3:37]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 3608067(2-Bromoethoxy)-tert-butyldimethylsilaneHCID 117652708N-(1H-benzimidazol-2-ylmethyl)-2-(5-chloro-2-oxo-1,3-benzothiazol-3 (2H)-yl)-N-methylacetamide

Product 1

HCID 123358874N-{[1-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-1H-benzimidazol-2-yl]methyl}-2-(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)-N-methylacetamide

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
95 °C

Procedure

To a mixture of N-(1H-benzimidazol-2-ylmethyl)-2-(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)-N-methylacetamide (500 mg) and DMF (15 mL) were added (2-bromoethoxy)(tert-butyl)dimethylsilane (555 μL) and K2CO3 (358 mg), followed by heating and stirring at 95° C. for 24 hours. The reaction mixture was diluted with EtOAc, and washed with water and brine in this order. The organic layer was dried over Na2SO4 and then concentrated under reduced pressure. To the resulting solid was added EtOAc, followed by suspending. An equivalent amount of Hex was added thereto, followed by collecting by filtration and washing with a Hex-EtOAc mixed solvent to obtain N-{[1-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-1H-benzimidazol-2-yl]methyl}-2-(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)-N-methylacetamide (523 mg).

Workup

  1. temperatureby heating
  2. washwashed with water and brine in this order
  3. dry with materialThe organic layer was dried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. additionTo the resulting solid was added EtOAc
  6. additionAn equivalent amount of Hex was added
  7. filtrationby collecting by filtration
  8. washwashing with a Hex-EtOAc mixed solvent

Sources & evidence

ORD record
ord-1d8e4f1d611d49f78e2e576d01ef6f8f
Source dataset
uspto-grants-2015_01
Patent number
US08937087B2

Reaction notes

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