Iron–Nickel Dual-Catalysis: A New Engine for Olefin Functionalization and the Formation of Quaternary Centers
作者:Samantha A. Green、Suhelen Vásquez-Céspedes、Ryan A. Shenvi
DOI:10.1021/jacs.8b05868
日期:2018.9.12
electron-deficient arenes, including Lewis basic heterocycles. Here we report a highly Markovnikov-selective, dual-catalytic olefin hydroarylation that tolerates arenes and heteroarenes of any electronic character. Hydrogen atom transfer controls the formation of branched products and arene halogenation specifies attachment points on the aromatic ring. Mono-, di-, tri-, and tetra-substituted alkenes yield Markovnikov
An Electroreductive Approach to Radical Silylation via the Activation of Strong Si–Cl Bond
作者:Lingxiang Lu、Juno C. Siu、Yihuan Lai、Song Lin
DOI:10.1021/jacs.0c10899
日期:2020.12.23
In this context, reactions mediated by silyl radicals have become increasingly attractive but methods for accessing these intermediates remain limited. We present a new strategy for silyl radical generation via electroreduction of readily available chlorosilanes. At highly biased potentials, electrochemistry grants access to silyl radicals through energetically uphill reductive cleavage of strong
Synthesis of Spirocyclic and Fused Isoxazoline Building Blocks
作者:Bohdan A. Chalyk、Vitalii V. Izhyk、Kyrylo Danyleiko、Bohdan Sosunovych、Bohdan V. Vashchenko、Oleksandr Zginnyk、Violetta Olshanska、Peter Teodorovic、Angelina V. Biitseva、Dmitriy M. Volochnyuk、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.202300282
日期:2023.6.6
A scalable and efficient approach to the synthesis of fused and spirocyclic sp3-enriched isoxazoline buildingblocks via the 1,3-dipolar cycloaddition of functionalized chloroximes and cyclic alkenes is disclosed. The target compounds are prepared on a multigram scale, and their potential for further functionalization is revealed.
A functional-group-tolerant, mild, formal double C−H oxidation protocol has been developed that can be used for the selective late-stage derivatization of prenylated compounds and natural products. This exocyclic-strain-driven cross-metathesis protocol allows the efficient coupling of highly substituted and electron-rich olefins.