1H-1,2,4-Triazole → 4-(2,4-Dichlorophenyl)-4-hydroxy-5-(1,2,4-triazol-1-yl)-hex-2-yne

HRID 2350826Notes

Reaction equation

HRID 2350826 reaction equation
[H-].[Na+].[NH:3]1[CH:7]=[N:6][CH:5]=[N:4]1.Br[CH:9]([CH3:23])[C:10]([C:15]1[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=1[Cl:22])([OH:14])[C:11]#[C:12][CH3:13]>CS(C)=O.[Cl-].[Na+].O>[Cl:22][C:16]1[CH:17]=[C:18]([Cl:21])[CH:19]=[CH:20][C:15]=1[C:10]([OH:14])([CH:9]([N:3]1[CH:7]=[N:6][CH:5]=[N:4]1)[CH3:23])[C:11]#[C:12][CH3:13]

Participants

6

Reactant 3

HCID 92571H-1,2,4-TriazoleHCID 24758Sodium hydrideHCID 198466985-Bromo-4-(2,4-dichlorophenyl)-4-hydroxy-hex-2-yne

Product 1

HCID 137486954-(2,4-Dichlorophenyl)-4-hydroxy-5-(1,2,4-triazol-1-yl)-hex-2-yneYield 87.8%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

A suspension of sodium hydride (2.54 g) in dry dimethylsulphonyl (200 ml) was stirred at room temperature under argon and 1,2,4-triazol 21.9 g) was added in portions over 10 minutes, followed by further stirring for 10 minutes. A solution of 5-bromo-4-(2,4-dichlorophenyl)-4-hydroxy-hex-2-yne (17 g) in dry DMSO (50 ml) was added over 15 minutes. The resultant solution was heated at 100° C. for about 100 hours. Concentrated brine solution (200 ml) was added and the mixture extracted with ethyl acetate (3×150 ml). The extracts were combined, washed with water until neutral, dried over anhydrous magnesium sulphate and the solvent removed in vacuo to give 14.38 g of a brown solid. This solid was purified by flash chromatography, eluted with portions of ethyl acetate (50-100%) in hexane). Fractions containing the fastest running major triazole-active spot on thin-layer chromatography were combined to give 2.91 g (18%) of a white solid.

Workup

  1. stirringby further stirring for 10 minutes
  2. extractionthe mixture extracted with ethyl acetate (3×150 ml)
  3. washwashed with water until neutral,
  4. dry with materialdried over anhydrous magnesium sulphate
  5. customthe solvent removed in vacuo

Sources & evidence

ORD record
ord-a2f8723308e54b79ac4683b516304d54
Source dataset
uspto-grants-1989_10
Patent number
US04871389

Reaction notes

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