Rh(<scp>iii</scp>)-catalyzed and alcohol-involved carbenoid C–H insertion into N-phenoxyacetamides using α-diazomalonates
作者:Jie Zhou、Jingjing Shi、Xuelei Liu、Jinlong Jia、Huacan Song、H. Eric Xu、Wei Yi
DOI:10.1039/c5cc00354g
日期:——
Here a new, mild and efficient Rh(iii)-catalyzed and alcohol-involved carbenoid insertion (ortho-alkylation) intoN-phenoxyacetamides using α-diazomalonates has been developed.
O-Cyclopropyl hydroxylamines, now accessible via a novel and scalable synthetic route, have been demonstrated to be bench-stable and practicalprecursors for the synthesis of N-heterocycles via a di-heteroatom [3,3]-sigmatropic rearrangement. In order to study the reactivity of these compounds in depth, a robust synthesis of both ring-substituted and ring-unsubstituted O-cyclopropyl hydroxylamines has
Generation and Radical–Radical Cross-Coupling of Alkenyloxy Radical
作者:Yunquan Man、Bo Xu
DOI:10.1021/acs.orglett.4c00627
日期:2024.3.29
the alkene moiety. The direct radical–radical cross-coupling of O radicals is also challenging (limited to N–O bond formation) because of the lack of suitable persistent radical species. This study demonstrated the feasibility of using Breslow intermediate radical (BIR) as a persistent radical to capture unstable π-conjugated O radicals and allow the C–O radical–radical cross-coupling.
烯烃连接的氧自由基很少使用,因为高反应性氧自由基与烯烃部分不相容。由于缺乏合适的持久性自由基种类,O自由基的直接自由基-自由基交叉偶联也具有挑战性(仅限于N-O键的形成)。这项研究证明了使用 Breslow 中间自由基 (BIR) 作为持久自由基来捕获不稳定的 π-共轭 O 自由基并允许 C-O 自由基-自由基交叉偶联的可行性。
Synthesis of α-oxygenated ketones and substituted catechols via the rearrangement of N-enoxy- and N-aryloxyphthalimides
作者:Michelle A. Kroc、Aditi Patil、Anthony Carlos、Josiah Ballantine、Stephanie Aguilar、Dong-Liang Mo、Heng-Yen Wang、Daniel S. Mueller、Donald J. Wink、Laura L. Anderson
DOI:10.1016/j.tet.2017.01.061
日期:2017.7
synthesis of α-oxygenated carbonylcompounds and catechols is the treatment of a carbonylcompound or a phenol with an electrophilic oxygen source. As an alternative approach to these important structures, formal [3,3]-rearrangements of N-enoxyphthalimides, N-enoxyisoindolinones, and N-aryloxyphthalimides have been explored. When used in combination with an initial Chan-Lam coupling, these transformations
Preparation of α-Oxygenated Ketones by the Dioxygenation of Alkenyl Boronic Acids
作者:Aditi S. Patil、Dong-Liang Mo、Heng-Yen Wang、Daniel S. Mueller、Laura L. Anderson
DOI:10.1002/anie.201202704
日期:2012.7.27
Two in two: Dioxygenation of alkenylboronicacids has been achieved with N‐hydroxyphthalimide. The two‐step process involves etherification of an alkenylboronicacid with N‐hydroxyphthalimide followed by a [3,3] rearrangement. The dioxygenated product can then be hydrolyzed to form either the corresponding α‐hydroxy ketone or the α‐benzoyloxy ketone.