Triethylamine → HCID 22618004, compound

Participants

Reaction Steps

Phosphorus oxychloride (80 ml) and triethylamine (44 ml) were added to a toluene suspension (400 ml) containing 40 g of the crystals obtained in step (1). The reaction mixture was refluxed with heating for 4 hours. After completion of the reaction, the reaction mixture was concentrated under reduced pressure and the residue was poured into ice water. The mixture was neutralized with sodium acetate and extracted with ethyl acetate. The organic layer was collected, washed with a saturated saline solution, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: ethyl acetate: n-hexane=1:9) to provide 41 g of 5-n-butyl-7-chloropyrazolo[1,5-a]pyrimidine as a light yellow oily compound.

Provenance & Evidence