p-Toluenesulfonic acid monohydrate → HCID 178462432, compound

Participants

Reaction Steps

791 mg (4.16 mmol) of p-toluenesulfonic acid monohydrate were added to a solution of 760 mg (3.77 mmol) of 3-fluoro-4-[(1E,3E)-5-oxo-1,3-pentadienyl]-benzonitrile [obtained as described in Example 1(ii) above] and 1.36 g (3.77 mmol) of (2R,3 R)-2-(2,4-difluorophenyl)-3-[[1-(hydroxymethyl)-2 -hydroxyethyl]thio]-1-(1H-1,2,4-triazol-1-yl)-2-butanol [prepared as described in Japanese Patent Application (Kokai) Hei 8-333350] in 13 ml of dichloromethane. The resulting mixture was concentrated using a rotary evaporator. 13 ml of dichloromethane and 13 g of 4A molecular sieves were added to the resulting residue and the mixture was then stirred at ambient temperature overnight. At the end of this time, an aqueous sodium hydrogen carbonate solution was added to the reaction mixture. The molecular sieves were removed by filtration and the filtrate was partitioned between ethyl acetate and water. The organic layer was dried and concentrated under reduced pressure. The resulting oil residue was purified by chromatography on a silica gel (20 a) column using a 1:1 mixture of ethyl acetate and hexane as the eluant to afford 1.42 g (yield 69%) of the title compound as an amorphous solid. The spectral data were identical to those of the title compound of Example 1.

Provenance & Evidence