Thioanisole → 4-[3-Chloro-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]phenol

Participants

Reaction Steps

A solution of 4-[3-chloro-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]phenyl benzyl ether (2.79 g) and thioanisole (3.56 g) intrifluoroacetic acid (25 ml) was stirred at ambient temperature overnight. The mixture was concentrated in vacuo. The residue was recrystallized from AcOEt (15 ml) and n-hexane (12 ml) to give 1st crop of FR282117 (1.48 g). The mother liqour was washed with H2O, saturated aqueous sodium chloride solution, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by silica gel column chromatography eluted with AcOEt/n-hexane=30%. The pure fractions were collected and concentrated in vacuo. The residual crystals were collected and washed with IPE to give 2nd crop of 4-[3-chloro-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]phenol(457.2 mg) white powder

Provenance & Evidence