Highly-functionalised difluorinated (hydroxymethyl)conduritol analogues via the Diels–Alder reactions of a difluorinated dienophile
作者:Andrea Arany、Patrick J. Crowley、John Fawcett、Michael B. Hursthouse、Benson M. Kariuki、Mark E. Light、Andrew C. Moralee、Jonathan M. Percy、Vittoria Salafia
DOI:10.1039/b314314g
日期:——
A difluorodienophile, synthesised using a Stille coupling reaction underwent tin(IV)-catalysed cycloaddition with three furans to afford oxa[2.2.1]bicycloheptenes in good yield. Reduction of ester and carbamate carbonyl groups and diol protection as the acetonide set the stage for palladium-catalysed hydrostannylation in two cases. Treatment of the stannanes with methyllithium triggered ring-opening to afford highly-functionalised difluorinated cyclohexenols which could be deprotected to afford (hydroxymethyl)conduritol analogues.
一种二氟二烯亲核体,通过Stille偶联反应合成,经过锡(IV)催化的环加成与三种呋喃反应,良好产率地生成了oxa[2.2.1]双环庚烯。酯和氨基甲酸酯的酮基还原以及二醇保护为在两种情况下进行的钯催化氢锡化反应奠定了基础。将锡烷与甲基锂处理引发开环,生成高度功能化的二氟化环己烯醇,这些化合物可以去保护,得到(hydroxymethyl)conduritol类似物。