Ethyl Acetate → HCID 69413899, compound

Participants

Reaction Steps

(5-Bromo-3-{[2-(4-fluorophenyl)-2-hydroxy-ethyl]-methyl-sulfamoyl}-thiophene-2-yl)carbamic acid tert-butyl ester (the compound of Preparation Example 97) (5.5 g), tributyl(1-ethoxyvinyl)tin (6.7 g), cesium fluoride (5.3 g) and tetrakis(triphenylphosphine)palladium (0.73 g) were stirred in 1,4-dioxane (50 mL) at 100° C. for 2 hours. After ethyl acetate was added and insoluble matter was removed by filtration, 2N hydrochloric acid was added, and the solution was stirred for 10 minutes. After washing the organic layer with water, an aqueous solution of sodium bicarbonate and saturated sodium chloride water, and was dried with anhydrous magnesium sulfate. The residue resulting from the removal of the solvent by evaporation was purified by silica gel column chromatography (hexane/ethyl acetate), and the title compound (3.2 g9 was obtained as a colorless solid.

Provenance & Evidence