Dimethyl Sulfoxide → 5-{4-Hydroxy-2-[4-(2-piperidin-1-ylethoxy)phenylamino]phenyl}indan-1-one

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Reaction Conditions

Reaction Steps

To dichloromethane (2 ml) was added oxalyl chloride (0.22 ml) under a nitrogen atmosphere, the solution was cooled at −78° C., a solution of dimethylsulfoxide (245 mg) in dichloromethane (2 ml) was added dropwise thereto over 10 minutes, and then solution was stirred for 45 minutes. A solution of 5-{4-methoxy-2-[4-(2-piperidin-1-ylethoxy)phenylamino]phenyl}indan-1-ol (552 mg) in dichloromethane (4 ml) was added dropwise thereto over 25 minutes, the solution was stirred for 40 minutes, then triethylamine (0.85 ml) was added dropwise thereto followed by sttirring for 20 minutes while warming from −78° C. to room temperature. Water was added thereto followed by stirring, the solution was extracted with ethyl acetate, then sequentially washed with water and brine, and the solvent was evaporated in vacuo. Obtained by purifying the residue by NH silica gel column chromatography (hexane-ethyl acetate system), to a solution of the resulting 5-{4-methoxy-2-[4-(2-piperidin-1-ylethoxy)phenylamino]phenyl}indan-1-one (118 mg) in methanesulfonic acid (3 ml) was added DL-methionine (110 mg), the solution was stirred for 5 hours at 80° C., then water was added thereto, the solution was stirred, and neutralized with aqueous ammonia. The soultion was extracted with ethyl acetate, then sequentially washed with water and brine, and the solvent was evaporated in vacuo. The residue was purified by NH silica gel column chromatography (ethyl acetate-methanol system) to provide the title compound (42 mg).

Provenance & Evidence