Sodium Azide → 6-(1-Azido-2,2,2-trifluoroethyl)-9-chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole

HRID 1628930Notes

Reaction equation

HRID 1628930 reaction equation
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[C:20]([Cl:21])=[CH:19][C:18]([Cl:22])=[CH:17][C:16]=4[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:24](Cl)[C:25]([F:28])([F:27])[F:26])=[CH:4][CH:3]=1.[N-:30]=[N+:31]=[N-:32].[Na+]>CS(C)=O.C(OCC)(=O)C>[N:30]([CH:24]([C:5]1[C:6]2[N:7]3[CH2:14][CH2:13][CH2:12][N:11]([C:15]4[C:16]([Cl:23])=[CH:17][C:18]([Cl:22])=[CH:19][C:20]=4[Cl:21])[C:8]3=[N:9][C:10]=2[C:2]([Cl:1])=[CH:3][CH:4]=1)[C:25]([F:27])([F:28])[F:26])=[N+:31]=[N-:32]

Participants

5

Reactant 2

HCID 33557Sodium AzideHCID 577862039-Chloro-6-(1-chloro-2,2,2-trifluoroethyl)-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole

Product 1

HCID 577860316-(1-Azido-2,2,2-trifluoroethyl)-9-chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazoleYield 97.2%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 9-chloro-6-(1-chloro-2,2,2-trifluoroethyl)-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole (290 mg, 0.576 mmol) and sodium azide (74.9 mg, 1.15 mmol) in dimethylsulfoxide (2.8 mL) was stirred at 100° C. for 2 h. After the mixture was diluted with ethyl acetate, the resultant mixture was washed with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 0-30% ethyl acetate/n-hexane gradient mixture to give the title compound as a colorless amorphous solid (286 mg, 0.560 mmol, 97%).

Workup

  1. washthe resultant mixture was washed with water and brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by flash column chromatography on silica gel eluting with a 0-30% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record
ord-74bdaff1fb004935a551c15a7b152b82
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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