Reacción #216444

Ecuación de reacción

ether

3-hydroxymethyl-3-n-propyloxetane

pyridine

ether

→

(3-propyloxetan-3-yl)methyl hex-5-ynoate

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONadded
2. 2
   LavadoAfter this time the organic phase was washed with water, 5% hydrochloric acid, saturated sodium bicarbonate solution and brine
3. 3
   Secadobefore drying over anhydrous magnesium sulphate
4. 4
   Otroevaporation in vacuo
5. 5
   OtroThe residue was purified by chromatography on silica
6. 6
   Lavadopre-eluted with hexane containing 1% triethylamine
7. 7
   LavadoElution with hexane/ether mixtures

Procedimiento

A mixture of hex-5-ynoic acid (1 g) and thionyl chloride (1.95 ml) in benzene (25 ml) was heated under reflux for 3 hours. The resulting solution was cooled and then evaporated in vacuo. The acid halide thus obtained was taken up in ether (5 ml) and added, dropwise, to a stirred solution of 3-hydroxymethyl-3-n-propyloxetane (1.2 g) and pyridine (0.8 ml) in dry ether (20 ml.). The reaction mixture was stirred at room temperature for 16 hours. After this time the organic phase was washed with water, 5% hydrochloric acid, saturated sodium bicarbonate solution and brine before drying over anhydrous magnesium sulphate and then evaporation in vacuo. The residue was purified by chromatography on silica, pre-eluted with hexane containing 1% triethylamine. Elution with hexane/ether mixtures gave (3-propyloxetan-3-yl)methyl hex-5-ynoate (1.33 g) as a colourless oil.

Fuente