Iron-Catalyzed C(<i>sp</i>
<sup>3</sup>
)−C(<i>sp</i>
<sup>3</sup>
) Bond Formation in 3,4-Dihydro-1,4-benzoxazin-2-ones
作者:Jie Dong、Wenjian Min、Haitao Li、Zhengjun Quan、Caixia Yang、Congde Huo
DOI:10.1002/adsc.201700816
日期:2017.11.23
A convenient iron-catalyzed oxidative dehydrogenative coupling reaction of 3,4-Dihydro-1,4-benzoxazin-2-ones with malonic esters or ketones was performed under mild reaction conditions to construct alkyl–alkyl C(sp3)−C(sp3) bonds. This transformation can be catalyzed efficiently by magnetically recoverable iron nanoparticles and the catalyst can be recycled easily for 7 times without decreasing activity
A convenient synthesis of 3,4-dihydro-1,4-benzoxazin-2-ones
作者:Nace Zidar、Danijel Kikelj
DOI:10.1016/j.tet.2008.04.010
日期:2008.6
3,4-Dihydro-1,4-benzoxazin-2-one was prepared for the first time by catalytic hydrogenation of 4-benzyl-3,4-dihydro-1,4-benzoxazin-2-one. A simple and efficient synthesis of 4-benzyl- and 4-alkyl-3,4-dihydro-1,4-benzoxazin-2-one derivatives from ethyl 2-(2-hydroxyphenylamino)acetate and aldehydes is described. Some considerations regarding the reactivity of 3,4-dihydro-1,4-benzoxazin-2-ones are given. (C) 2008 Elsevier Ltd. All rights reserved.
Iron-catalyzed oxidative sp<sup>3</sup> carbon–hydrogen bond functionalization of 3,4-dihydro-1,4-benzoxazin-2-ones
A novel and efficient iron-catalyzed sp3 carbon-hydrogenbond functionalization of benzoxazinone derivatives has been developed. For the first time, benzoxazin-2-ones were hired as substrates in an oxidative dehydrogenative coupling reaction....
Oxidative Cross-Dehydrogenative-Coupling Reaction of 3,4-Dihydro-1,4-Benzoxazin-2-ones through Visible-Light Photoredox Catalysis
作者:Guo-Yan Zhang、Kai-Xin Yu、Chen Zhang、Zhi Guan、Yan-Hong He
DOI:10.1002/ejoc.201701683
日期:2018.1.31
The cross‐dehydrogenative‐coupling (CDC) reaction of benzoxazin‐2‐ones through visible‐light photoredox catalysis in air at room temperature is described.