Palladium-catalyzed intramolecular decarboxylative allylic arylation of α-aryl-γ-methylidene-δ-valerolactones
作者:Ryo Shintani、Takaoki Tsuji、Soyoung Park、Tamio Hayashi
DOI:10.1039/b924416f
日期:——
A palladium-catalyzed intramolecular decarboxylative cyclization of α-aryl-γ-methylidene-δ-valerolactones, followed by olefin isomerization, has been developed to give fused polycyclic aromatic compounds under mild conditions. The process described here can be regarded as a formal decarboxylative allylic arylation without using a pre-formed organometallic nucleophile. The reaction can be conducted on a gram scale and the products thus obtained are further derivatized with ease.
开发了一种钯催化的分子内脱羧环化反应,该反应针对α-芳基-γ-美克里(γ-methylidene-δ-valerolactones),随后进行烯烃异构化,能够在温和条件下生成融合的多环芳香化合物。这里所描述的过程可以视为一种正式的脱羧烯丙基芳基化反应,而无需使用预先形成的有机金属亲核试剂。这一反应可以在克级规模上进行,得到的产品也可以方便地进一步衍生化。