A general Pd-catalyzed α- and γ-benzylation of aldehydes for the formation of quaternary centers
作者:Ivan Franzoni、Laure Guénée、Clément Mazet
DOI:10.1039/c5ob00702j
日期:——
A palladium-catalyzed benzylation of α-branched aldehydes has been developed using benzyl methyl carbonates. The method gives access to congested quaternary centers in the vicinity of one of the most sensitive carbonyl functionalities and displays unprecedented generality with respect to both coupling partners. Evidence for the direct involvement of a Pd-η3-benzyl intermediate is provided. Extension
已经使用碳酸苄基甲基酯开发了钯催化的α-支化醛的苄基化反应。该方法可以访问最敏感的羰基官能团之一附近的拥挤的四元中心,并且对于两个偶合伙伴都显示出空前的普遍性。证据钯-η的直接参与3提供中间苄基。进一步证明了该策略扩展到α,β-不饱和醛的γ-苄基化。