Sodium Sulfate → HCID 53302893, compound

Participants

Reaction Conditions

Reaction Steps

5-(5-Bromo-2-methoxybenzenesulfonyl)-2-methoxyaniline (2 grams, 5.35 mmol) was added to 100 mL three necked round bottomed flask, followed by the addition of 1-methyl-4-piperidone (550 mg, 4.86 mmol), sodium sulfate (1.4 grams, 9.73 mmol) and acetic acid (40 mL) under nitrogen atmosphere. The reaction mass was stirred for 4 hours at room temperature (27° C.). Then sodium triacetoxy borohydride (3.08 grams, 14.60 mmol) was added to the reaction mass at 20-25° C. in 5 minutes. This reaction mixture was further stirred for another 2 hours at room temperature. The reaction mixture was then quenched into 100 mL water, basified to pH 9 with 50% aqueous sodium hydroxide solution under cooling (10° C.) and extracted the product with ethyl acetate (3×100 mL). The combined organic layer was washed with saturated brine solution (2×50 mL), dried over anhydrous sodium sulfate, filtered and concentrated under vacuum to obtain oily mass. The technical product was further purified by column chromatography using ethyl acetate and methanol as eluents to obtain the title product. Yield: 1.56 grams.

Provenance & Evidence