A Study of the Conjugate Addition of Thionucleophiles to 2(5H)-Furanones
作者:Felix Busqué、Pedro de March、Marta Figueredo、Josep Font、Lluïsa González
DOI:10.1002/ejoc.200300693
日期:2004.4
Several new 4-thio-4,5-dihydro-2(3H)-furanones were prepared by the conjugate addition reactions of different thioacids, dithioacids, xanthates and dithiocarbamates to 2(5H)-furanones. When 5-methyl-2(5H)-furanone was used as the electrophilic substrate, the reaction was diastereoselective affording exclusively the cis-α,β-disubstituted butanolides. Some adducts were selectively hydrolysed to deliver