Efficient Synthesis of Dihydrofurans with Sulfide Groups by Ceric(IV) Ammonium Nitrate-Mediated Oxidative Cycloaddition of 1,3-Dicarbonyl Compounds to Vinyl Sulfides. Application to the Synthesis of Benzo[<i>b</i>]naphtho[2,3-<i>d</i>]furan-6,11-dione and First Total Synthesis of Millettocalyxins C and Pongamol Methyl Ether
作者:Yong Rok Lee、Keon Yong Kang、Gun Joon Lee、Won Kyong Lee
DOI:10.1055/s-2003-41023
日期:——
Ceric(IV) ammonium nitrate-mediated oxidative cycloaddition of 1,3-dicarbonyls to vinyl sulfides afforded substituted dihydrofurans with sulfide groups in moderate yields. This new synthetic method has been applied to thesynthesis of benzo[b]naphtho[2,3-d]furan-6,11-dione and furanoflavone natural products such as millettocalyxins C and pongol methyl ether.
Ceric(IV) 硝酸铵介导的 1,3-二羰基与乙烯基硫化物的氧化环加成反应以中等收率提供了具有硫化物基团的取代二氢呋喃。这种新的合成方法已应用于苯并[b]萘并[2,3-d]呋喃-6,11-二酮和呋喃黄酮类天然产物如小米花萼素C、凤梨甲醚的合成。