Water → HCID 86731280, compound

Participants

Reaction Steps

To a solution of 4-(cyclopropylmethoxy)-3-fluoro-N-(7-hydroxy-1,4-dioxaspiro[4.5]dec-8-yl)benzamide (4.53 g) in dimethyl sulfoxide (40 mL) were added triethylamine (5.18 mL) and sulfur trioxide-pyridine complex (5.92 g), and the mixture was stirred for 1 hr under a nitrogen stream. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. To a solution of the obtained residue in THF (30 mL) was added (methoxycarbonylsulfamoyl)triethylammonium hydroxide inner salt (4.66 g), and the mixture was stirred at 60° C. for 30 min. To the reaction mixture was added saturated brine, and the mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate, the solvent was evaporated, and the obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give the title compound (3.18 g).

Provenance & Evidence