[EN] COMPOUND CONTAINING BIS(AZANYLYLIDENE) SULFONYL STRUCTURE AND USE THEREOF IN MEDICINE<br/>[FR] COMPOSÉ CONTENANT UNE STRUCTURE BIS(AZANYLYLIDÈNE) SULFONYLE ET SON UTILISATION EN MÉDECINE<br/>[ZH] 含二氮杂亚基磺酰结构的化合物及其在医药上的用途
We present a straightforward synthesis of 3-aryl-2,5-dihydrofurans by ring contraction of 4-aryl-3,6-dihydro-2H-pyrans with the repeated treatment of MCPBA and BF3-OEt2. The building block 3-aryltetrahydrofuran-3-carboxylic acid with potential biological activities was also prepared.