An Entry to 5-(1-Alkenyl)-3(2<i>H</i>)-furanones through Cycloaddition of Phosphorus-Functionalized Nitrile Oxide to Acetylene Alcohols. An Effective Synthesis of Geiparvarin
作者:Otohiko Tsuge、Shuji Kanemasa、Hiroyuki Suga
DOI:10.1246/cl.1987.323
日期:1987.2.5
α-(diethoxyphosphoryl)acetonitrile oxide to acetylene alcohols is followed by an alkylation, a reductive cleavage of the N–O bond, and an acid-catalyzed cyclization to form 5-(diethoxyphosphorylmethyl)-3(2H)-furanones in good yields. Subsequent Horner-Emmons olefination using triethylamine and lithium bromide furnishes E-isomers of 5-(1-alkenyl)-3(2H)-furanones as majorproducts. This method has been applied