Water → 4'-[(2-n-Butyl-benzimidazol-1-yl)-methyl]-2-(1-triphenylmethyl-tetrazol-5-yl)-biphenyl

HRID 344101Notes

Reaction equation

HRID 344101 reaction equation
[CH2:1]([C:5]1[NH:6][C:7]2[CH:13]=[CH:12][CH:11]=[CH:10][C:8]=2[N:9]=1)[CH2:2][CH2:3][CH3:4].CC(C)([O-])C.[K+].Br[CH2:21][C:22]1[CH:27]=[CH:26][C:25]([C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=2[C:34]2[N:38]([C:39]([C:52]3[CH:57]=[CH:56][CH:55]=[CH:54][CH:53]=3)([C:46]3[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=3)[C:40]3[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=3)[N:37]=[N:36][N:35]=2)=[CH:24][CH:23]=1.O>CS(C)=O>[CH2:1]([C:5]1[N:6]([CH2:21][C:22]2[CH:23]=[CH:24][C:25]([C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=3[C:34]3[N:38]([C:39]([C:52]4[CH:57]=[CH:56][CH:55]=[CH:54][CH:53]=4)([C:46]4[CH:47]=[CH:48][CH:49]=[CH:50][CH:51]=4)[C:40]4[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=4)[N:37]=[N:36][N:35]=3)=[CH:26][CH:27]=2)[C:7]2[CH:13]=[CH:12][CH:11]=[CH:10][C:8]=2[N:9]=1)[CH2:2][CH2:3][CH3:4]

Participants

6

Reactant 4

HCID 962WaterHCID 22122Benzimidazole, 2-butyl-HCID 100534615-(4'-(Bromomethyl)(1,1'-biphenyl)-2-yl)-1-trityl-1H-tetraazoleHCID 23665647Potassium tert-butoxide

Product 1

HCID 150694034'-[(2-n-Butyl-benzimidazol-1-yl)-methyl]-2-(1-triphenylmethyl-tetrazol-5-yl)-biphenyl

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

0.87 g (5 mmol) of 2-n-butyl-benzimidazole is dissolved in 20 ml of dimethylsulphoxide and 0.61 g (5.5 mmol) of potassium tert.butoxide is added with stirring. After 1/2 hour, 4'-bromomethyl-2-(1-triphenylmethyl-1H-tetrazol-5-yl)-biphenyl is added and the mixture is stirred for 3 hours at ambient temperature. It is poured into about 50 ml of iced water and extracted by shaking 3 times using 30 ml of ethyl acetate each time. The ethyl acetate phase is extracted by shaking using 30 ml of water, dried over sodium sulphate and evaporated to dryness. The crude product is purified over a silica gel column (grain size: 0.063-0.2 mm, eluting agent: methylene chloride/ethanol=100:1).

Workup

  1. stirringthe mixture is stirred for 3 hours at ambient temperature
  2. extractionextracted
  3. stirringby shaking 3 times
  4. extractionThe ethyl acetate phase is extracted
  5. stirringby shaking
  6. dry with materialdried over sodium sulphate
  7. customevaporated to dryness
  8. customThe crude product is purified over a silica gel column (grain size: 0.063-0.2 mm, eluting agent: methylene chloride/ethanol=100:1)

Sources & evidence

ORD record
ord-f594c93fb4044552b80f69f26a40e16e
Source dataset
uspto-grants-1999_01
Patent number
US05864043

Reaction notes

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