Transition metal- and photo-free radical borylation of alkyl bromides and iodides by silane

2021 ◽  
Author(s):  
Beiqi Sun ◽  
Sihan Zheng ◽  
Fanyang Mo
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Alkyl Bromides ◽  
Boronic Esters ◽  
Neutral Conditions

We report an operationally simple and neutral conditions for borylation of alkyl bromides and iodides to alkyl boronic esters under transition metal- and photo-free conditions. A series of substrates with...

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

A metal-free radical cascade reaction of phosphine oxides with 2-aryloxy phenylacetylenes to assemble diphosphonyl xanthene derivatives

2021 ◽  
Author(s):  
Tao Fan ◽  
Yan Liu ◽  
Caina Jiang ◽  
Yanli Xu ◽  
Yan-Yan Chen
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Cascade Reaction ◽  
Phosphine Oxides ◽  
Metal Free ◽  
Mild Conditions ◽  
Xanthene Derivatives ◽  
Reaction Proceeds ◽  
Radical Cascade

A radical cascade reaction of 2-aryloxy phenylacetylene with phosphine oxides promoted by K2S2O8 was developed, provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with...

scholarly journals Free-radical gases on two-dimensional transition-metal disulfides (XS2, X = Mo/W): robust half-metallicity for efficient nitrogen oxide sensors

2018 ◽  
Vol 9 ◽  
pp. 1641-1646 ◽  
Author(s):  
Chunmei Zhang ◽  
Yalong Jiao ◽  
Fengxian Ma ◽  
Sri Kasi Matta ◽  
Steven Bottle ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Density Functional ◽  
Single Layer ◽  
Metal Sulfides ◽  
Half Metallicity ◽  
Functional Theory ◽  
Half Metallic ◽  
Gas Molecules ◽  
High Level

The detection of single gas molecules is a highly challenging work because it requires sensors with an ultra-high level of sensitivity. By using density functional theory, here we demonstrate that the adsorption of a paramagnetic unpaired free radical gas (NO) on a monolayer of XS2 (X = Mo, W) can trigger the transition from semiconductor to half metal. More precisely, the single-layer XS2 (X = Mo, W) with NO adsorbed on it would behave like a metal in one spin channel while acting as a semiconductor in the other spin orientation. The half-metallicity is robust and independent of the NO concentration. In contrast, no half-metallic feature can be observed after the adsorption of other free radical gases such as NO2. The unique change in electronic properties after the adsorption of NO on transition-metal sulfides highlights an effective strategy to distinguish NO from other gas species by experimentally measuring spin-resolved transmission. Our results also suggest XS2 (X = Mo, W) nanosheets can act as promising nanoscale NO sensors.

scholarly journals Transition-Metal-Free Radical C(sp3)–C(sp2) and C(sp3)–C(sp3) Coupling Enabled by 2-Azaallyls as Super-Electron-Donors and Coupling-Partners

2017 ◽  
Vol 139 (45) ◽  
pp. 16327-16333 ◽  
Author(s):  
Minyan Li ◽  
Simon Berritt ◽  
Lucas Matuszewski ◽  
Guogang Deng ◽  
Ana Pascual-Escudero ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Electron Donors ◽  
Metal Free

Transition-metal-free polycyclic indoline formation via a free radical pathway: a computational mechanistic study

2020 ◽  
Vol 139 (3) ◽  
Author(s):  
Chenguang Luo ◽  
Lin Lu ◽  
Lin Zhang ◽  
Zuoyin Yang ◽  
Min Pu ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Mechanistic Study ◽  
Metal Free

scholarly journals α-Perfluoroalkyl-β-alkynylation of alkenes via radical alkynyl migration

2017 ◽  
Vol 8 (10) ◽  
pp. 6888-6892 ◽  
Author(s):  
Xinjun Tang ◽  
Armido Studer
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

Transition metal-free radical α-perfluoroalkylation with concomitant β-alkynylation of unactivated alkenes is presented.

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