Novel Use of a Selenoalkyne Within Untraditionally Mild Dötz Benzannulation Processes; Total Synthesis of a Calceolaria andinaL. Natural Hydroxylated Naphthoquinone
作者:John J. Caldwell、Robert Colman、William J. Kerr、Euan J. Magennis
DOI:10.1055/s-2001-16782
日期:——
A total synthesis of the Calceolaria andina L. extract 2-(1,1-dimethyl-2-propenyl)-3-hydroxy-1,4-naphthalenedione is described incorporating the first reported Dötz benzannulation of a selenoalkyne. Importantly, it has been shown that it is possible to effect this annulation at ambient temperature under dry state conditions with a significant improvement in cyclisation yield.
总合成方法描述了Calceolaria andina L.提取物2-(1,1-二甲基-2-丙炔基)-3-羟基-1,4-萘二酮的制备,其中首次报道了包含硒炔的Dötz苯环化反应。重要的是,已经证明在干燥状态下环境温度下进行这种环化反应是可能的,并且环化产率显著提高。