Selective C(sp<sup>3</sup>)–H activation of simple alkanes: visible light-induced metal-free synthesis of phenanthridines with H<sub>2</sub>O<sub>2</sub> as a sustainable oxidant
A visible light-induced metal-free C(sp3)–H phenanthridinylation of simple alkanes with isonitrile is developed with H2O2 as a terminal sustainable oxidant.
A radical addition/cyclization of diverse ethers to 2-isocyanobiaryls under mildly basic aqueous conditions
作者:Cintia Anton-Torrecillas、Diego Felipe-Blanco、Jose C. Gonzalez-Gomez
DOI:10.1039/c6ob02103d
日期:——
Mildly basic aqueous conditions facilitated the tert-butyl peroxybenzoate (TBPB) mediated dehydrogenative addition of a range of ethers, including acetals, to diverse substituted 2-isocyanobiaryls. Mechanistic studies suggest that this radical cascade is an example of base promoted homolytic aromatic substitution (BHAS).
Tandem dual C(sp3)-H/C(sp2)-H functionalization: a radical cyclization of 2-isocyanobiphenyl with ether to 6-alkylated phenanthridine
作者:ChangDuo Pan、Jie Han、Zhu ChengJian
DOI:10.1007/s11426-014-5118-7
日期:2014.8
A simple and efficient radical coupling of 2-isocyanobiphenyl with ethers was developed, providing a variety of 6-alkylated phenanthridines. Both cyclic and acyclic ethers are suitable substrates for this transformation, which comprised the functionalization of two C-H bonds: the sp3 C-H of ether and sp2 C-H of phenyl group. The kinetic isotope effect (KIE) revealed that the cleavage of sp3 C-H bond would be involved in the rate-determining step.
Boryl Radicals-Triggered Selective C–H Functionalization for the Synthesis of Diverse Phenanthridine Derivatives
作者:Ao Guo、Jia-Bin Han、Xiang-Ying Tang
DOI:10.1021/acs.orglett.8b00642
日期:2018.4.20
DMF with isocyanides is developed to deliver diverse phenanthridine derivatives in good to excellent yields. The substrate scope is broad, and a wide range of functional groups are tolerated under the standard conditions. The rapid removal of HBPin species by 4-cyanopyridine 1-oxide provides the driving force for this reaction. This new method should make boryl radicals widely applicable in organic synthesis
tert-Butyl peroxybenzoate (TBPB)-mediated 2-isocyanobiaryl insertion with 1,4-dioxane: efficient synthesis of 6-alkyl phenanthridines via C(sp3)–H/C(sp2)–H bond functionalization
作者:Jia-Jia Cao、Tong-Hao Zhu、Shun-Yi Wang、Zheng-Yang Gu、Xiang Wang、Shun-Jun Ji
DOI:10.1039/c4cc00743c
日期:——
of 6-alkyl phenanthridines by tert-butyl peroxybenzoate (TBPB)-mediated 2-isocyanobiaryl insertion with 1,4-dioxane was established. Two new C-C bonds were formed in this reaction via a sequentialC(sp(3))-H/C(sp(2))-H bond functionalization under metal-free conditions.