Efficient Generation and Synthetic Applications of Alkyl‐Substituted Siloxycarbenes: Suppression of Norrish‐Type Fragmentations of Alkanoylsilanes by Triplet Energy Transfer
作者:Kento Ishida、Hokuto Yamazaki、Chihiro Hagiwara、Manabu Abe、Hiroyuki Kusama
DOI:10.1002/chem.201904635
日期:2020.1.27
some alkanoylsilanes because Norrish-type fragmentations compete, which limit the synthetic utility of alkanoylsilanes as carbene precursors. In this study, generation of siloxycarbenes from alkanoylsilanes by visible-light-induced energy transfer was examined by using an Ir complex, [IrdF(CF3 )ppy}2 (dtbpy)]PF6 , and was successfully applied to the C-C coupling reactions with boronic esters or aldehydes
已知酰基硅烷在光辐照下会异构化为甲硅烷碳烯,因此生成的碳烯可以用于各种合成反应。但是这种卡宾的形成不一定对某些链烷酰基硅烷有效,因为诺里斯型断裂竞争,这限制了链烷酰基硅烷作为卡宾前体的合成效用。在这项研究中,通过使用Ir络合物[Ir dF(CF3)ppy} 2(dtbpy)] PF6考察了由可见光诱导的能量转移从烷酰基硅烷生成甲硅烷碳烯,并将其成功应用于CC偶联反应与硼酸酯或醛。这种方法有效地抑制了不良的诺里斯型反应,并拓宽了烷酰基硅烷的合成效用。