Dimethylformamide → HCID 10670178, compound

Participants

Reaction Steps

A mixture of 3-chloro-4-hydroxy-6-methyl-2H-pyran-2-one (0.493 g, 3.07 mmol), DMF and K2CO3 (0.467 g, 3.38 mmol) was stirred at room temperature under N2 for 0.5 hours then 2-chloromethyl-4-isopropyl-6-methoxysaccharin (0.978 g, 3.22 mmol) was added in one portion. The mixture was stirred at room temperature for 3 hours, and then at 75° C. for 3 hours. The mixture was poured into water, extracted with ethyl acetate and the organic layer was washed with brine and dried. The solvent was removed in vacuo and the residue was purified by column chromatography on silica eluting with 30% ethyl acetate/hexane to afford 0.25 g (18.1% ) of 2-(3-chloro-6-methyl-2-oxo-2H-pyran-4-yl)oxymethyl-4-isopropyl-6-methoxysaccharin, m.p. 182.5°-183.5° C. after recrystallization from ether/hexane.

Provenance & Evidence