Diethylamine → HCID 20064731, compound

Participants

Reaction Conditions

Reaction Steps

A reaction vessel was charged with 96.4 g (400 mmol) of ethyl 2-hydroxy-4-trifluoromethyl-5-thiazolecarboxylate and 117 g (766 mmol) of phosphorus oxychloride and then cooled in an ice bath. To the cooled mixture was added 40 g of diethylamine. The reaction mixture was heated at reflux at 163° C. with stirring for about 14 hours. Excess phosphorus oxychloride was removed under reduced pressure. The residue was poured into ice water and a solid precipitate was collected. The solid precipitate was dissolved in ethyl ether, washed with 5% sodium hydroxide, dried with calcium sulfate, and concentrated under reduced pressure to provide 50 g of residue. This residue was subjected to Kugelrohr distillation (100°-120° C. @ 0.5 mm Hg) to provide 3.5 g of a yellow liquid identified in Table I.

Provenance & Evidence