Efficient, Stereoselective Approach to the Synthesis of 3-(1-Phenyl-2-(<i>Z</i>-styrylsulfonyl)-1<i>H</i>-imidazol-4-yl)-2<i>H</i>-chromen-2-ones
作者:Nalajam Guravaiah、Vedula Rajeswar Rao
DOI:10.1080/00397911003797874
日期:2011.3.28
Abstract Reaction of phenyl acetylene with 3-(1-aryl-2-mercapto-4-imidazolyl)-2H-1-benzopyran-2-ones (4) in the presence of sodium hydroxide in absolute ethanol led to the formation of 3-(1-phenyl-2-(Z-styrylthio)-1H-imidazol-4-yl)-2H-chromen-2-ones (6) in excellent yields. These, on further oxidation with H2O2/AcOH, gave the corresponding sulfones (7) with retention of stereochemistry.
摘要 苯乙炔与 3-(1-芳基-2-巯基-4-咪唑基)-2H-1-苯并吡喃-2-酮 (4) 在氢氧化钠存在下在无水乙醇中反应生成 3- (1-苯基-2-(Z-苯乙烯硫基)-1H-咪唑-4-基)-2H-色烯-2-酮 (6) 以极好的收率。这些,用 H2O2/AcOH 进一步氧化,得到相应的砜 (7),保留立体化学。