Triethylamine → HCID 19608373, compound

Participants

Reaction Steps

Phosphorus oxychloride (6.4 ml) and triethylamine (3.5 ml) were added to 40 ml of a toluene suspension containing 4.2 g of the crystals obtained in step (4), and the mixture was refluxed with heating for 6 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=4:1) to provide 4.3 g of 5-(3-acetoxybutyl)-7-chloropyrazolo[1,5-a]pyrimidine as a light yellow oily compound.

Provenance & Evidence