Réaction #351237

Équation de réaction

tetrazole

5-(2-Pyridylmethyl)-1H-tetrazole

triethylamine

acetonitrile

1-bromododecane

→

4-(2-pyridylmethyl)-2-dodecyl-2H-tetrazole

Solvants

hexane

Conditions de réaction

Traitement

1. 1
   TempératureThe suspension was heated
2. 2
   Températureto reflux
3. 3
   TempératureThe solution was refluxed for 16 hours
4. 4
   Autrethe solvent removed in vacuo
5. 5
   AutreThe residue was triturated with ethyl acetate
6. 6
   Filtrationfiltered
7. 7
   Autreconcentration of the filtrate in vacuo leaving a maroon-colored liquid
8. 8
   AutreThe 2-isomer was obtained
9. 9
   Autreremoving the impurities

Mode opératoire

The tetrazole (a) (3.0 g; 0.015 moles) was taken up in acetonitrile (50 mL) containing two equivalents of triethylamine (3.0 g; 0.030 moles). The suspension was heated to reflux and then treated with 1-bromododecane (3.7 g; 0.015 moles) dropwise for several minutes. The solution was refluxed for 16 hours, cooled to room temperature, and the solvent removed in vacuo. The residue was triturated with ethyl acetate, filtered, and concentration of the filtrate in vacuo leaving a maroon-colored liquid. The 2-isomer was obtained by dissolving the crude product in 50% hexane/50% ethyl acetate and removing the impurities, including the 1-regioisomer, by silica gel chromatography. Yield: 2.0 g (41%).

Source