1-[5-bromo-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-one → HCID 20813973, compound

HRID 896333Notes

Reaction equation

HRID 896333 reaction equation
Br[C:2]1[CH:29]=[CH:28][C:5]2[N:6]([CH2:23][CH2:24][CH:25]([CH3:27])[CH3:26])[C:7]([CH2:9][N:10]3[C:14]4[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=4[N:12]([CH:19]([CH3:21])[CH3:20])[C:11]3=[O:22])=[N:8][C:4]=2[CH:3]=1.[CH2:30](C([Sn])=C(CCCC)CCCC)[CH2:31]CC>C1(C)C=CC=CC=1.CCOC(C)=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:19]([N:12]1[C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[N:10]([CH2:9][C:7]2[N:6]([CH2:23][CH2:24][CH:25]([CH3:27])[CH3:26])[C:5]3[CH:28]=[CH:29][C:2]([CH:30]=[CH2:31])=[CH:3][C:4]=3[N:8]=2)[C:11]1=[O:22])([CH3:21])[CH3:20]

Participants

6

Reactant 2

HCID 208139981-[5-bromo-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-oneHCID 53438229Tri(butyl)vinyltin

Product 1

HCID 20813973HCID 20813973, compoundYield 32.3%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 1-[5-bromo-1-(3-methyl-butyl)-1H-benzoimidazol-2-ylmethyl]-3-isopropyl-1,3-dihydro-benzoimidazol-2-one (90 mg, 0.2 mmol), tributylvinyltin (76 mg, 0.24 mmol) and tetrakis(triphenylphosphine)palladium(0) (23 mg, 0.02 mmol) in toluene (4 mL) was heated to reflux for 4 h. After cooling, the reaction mixture was diluted with EtOAc and washed with sat. NaHCO3 and brine. The organic layer was dried over MgSO4 and evaporated. The residue was purified by flash chromatography (hexanes:EtOAc 4:1 to 2:1) to give 26 mg (32%) of 1-isopropyl-3-[1-(3-methyl-butyl)-5-vinyl-1H-benzoimidazol-2-ylmethyl]-1,3-dihydro-benzoimidazol-2-one as a off-white solid.

Workup

  1. temperaturewas heated
  2. temperatureto reflux for 4 h
  3. temperatureAfter cooling
  4. washwashed with sat. NaHCO3 and brine
  5. dry with materialThe organic layer was dried over MgSO4
  6. customevaporated
  7. customThe residue was purified by flash chromatography (hexanes:EtOAc 4:1 to 2:1)

Sources & evidence

ORD record
ord-2bf49f8e5cff4ed08ea16878901b0ebe
Source dataset
uspto-grants-2005_07
Patent number
US06919331B2

Reaction notes

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