The present invention relates to a method for preparing 4-(3-(3-fluorophenyl)-5,5-dimethyl-4-oxo-4,5-dihydrofuran-2-yl)benzenesulfonamide. By using the method of the present invention, the compound can be mass-produced at a high yield in accordance with a very convenient and economical method. The method for preparing a compound represented by the chemical formula 1 comprises the steps of: (1) obtaining a compound of the chemical formula 3 by activating a compound of the chemical formula 2 (2) obtaining a compound of the chemical formula 5 by making the compound of the chemical formula 3 react with a compound of the chemical formula 4 (3) obtaining a compound of the chemical formula 6 by making the compound of the chemical formula 5 react with a compound of the chemical formula 11 (4) obtaining a compound of the chemical formula 7 by partially oxidizing the compound of the chemical formula 6 (5) obtaining a compound of the chemical formula 8 by converting the compound of the chemical formula 7 into an &alpha-acyloxy-thioether intermediate through a pummerer rearrangement and oxidizing the same (6) obtaining a compound of the chemical formula 9 by hydrolyzing the compound of the chemical formula 8 and obtaining the compound of the chemical formula 1 by activating the compound of the chemical formula 9 to obtain a sulfonyl chloride intermediate and making the same react with ammonia water.COPYRIGHT KIPO 2015본 발명은 4-(3-(3-플루오로페닐)-5,5-디메틸-4-옥소-4,5-디하이드로 푸란-2-일)벤젠설폰아마이드를 제조하는 방법에 관한 것으로, 본 발명의 방법을 이용하면 상기 화합물을 매우 간편하고 경제적인 방법에 따라 고수율로 대량 생산할 수 있다.
