Triethylamine → 4-(2,4-dichlorophenyl)-5-(4-fluorophenyl)-2-oxo-4-(1H-1,2,4-triazol-1-yl)methyl-1,3-dioxolane

HRID 65022Notes

Reaction equation

HRID 65022 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]([OH:25])([CH2:19][N:20]1[CH:24]=[N:23][CH:22]=[N:21]1)[CH:10]([C:12]1[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=1)[OH:11].C(N(CC)CC)C.C(Cl)(=O)[C:34](Cl)=[O:35].C(=O)(O)[O-].[Na+]>C(Cl)(Cl)Cl>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1([CH2:19][N:20]2[CH:24]=[N:23][CH:22]=[N:21]2)[CH:10]([C:12]2[CH:13]=[CH:14][C:15]([F:18])=[CH:16][CH:17]=2)[O:11][C:34](=[O:35])[O:25]1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 516892Sodium BicarbonateHCID 13391691HCID 13391691, compound

Product 1

HCID 134227404-(2,4-dichlorophenyl)-5-(4-fluorophenyl)-2-oxo-4-(1H-1,2,4-triazol-1-yl)methyl-1,3-dioxolaneYield 51.3%

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent2×

Procedure

To a solution of 400 mg of 2-(2,4-dichlorophenyl)-1-(4-fluorophenyl)-3-(1H-1,2,4-triazol-1-yl)-1,2-propanediol and 430 mg of triethylamine in 20 ml of dry chloroform is added a solution of 532 mg of oxalyl chloride and 2 ml of dry chloroform in small portions with ice-cooling, and the mixture is stirred at room temperature for 1 hour. The reaction mixture is mixed with ice-water and aqueous sodium bicarbonate solution and extracted with methylene chloride. The organic layer is washed with water, dried over anhydrous sodium sulfate, and concentrated. The residue is chromatographed on a column of silica-gel and eluted with benzene-ethyl acetate (1:1 v/v). The eluate is concentrated, and the resulting residue is crystallized from ethyl acetate-isopropyl ether to give 219 mg of 4-(2,4-dichlorophenyl)-5-(4-fluorophenyl)-2-oxo-4-(1H-1,2,4-triazol-1-yl)methyl-1,3-dioxolane as crystals. m.p. 190°-191° C. Yield: 51.3%

Workup

  1. temperaturecooling
  2. extractionextracted with methylene chloride
  3. washThe organic layer is washed with water
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated
  6. customThe residue is chromatographed on a column of silica-gel
  7. washeluted with benzene-ethyl acetate (1:1 v/v)
  8. concentrationThe eluate is concentrated
  9. customthe resulting residue is crystallized from ethyl acetate-isopropyl ether

Sources & evidence

ORD record
ord-9e3759c7a1044d70b7d89a62985e2ba9
Source dataset
uspto-grants-1986_09
Patent number
US04612322

Reaction notes

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