Direct Photocatalytic S–H Bond Cyanation with Green “CN” Source
作者:Wei Guo、Wen Tan、Mingming Zhao、Lvyin Zheng、Kailiang Tao、Deliang Chen、Xiaolin Fan
DOI:10.1021/acs.joc.8b00887
日期:2018.6.15
Herein we report a novel C–S bond cleavage and reconstruction strategy for the synthesis of thiocyanates through direct photocatalytic S–Hbond cyanation from thiols and inorganic thiocyanate salts. In our strategy, the unprecedented example of cutting off C–S bond of SCN– to deliver the green “CN” sources is demonstrated. This transformation features nontoxic and inexpensive “CN” sources, available
5‐(Cyano)dibenzothiophenium Triflate: A Sulfur‐Based Reagent for Electrophilic Cyanation and Cyanocyclizations
作者:Xiangdong Li、Christopher Golz、Manuel Alcarazo
DOI:10.1002/anie.201904557
日期:2019.7.8
and its reactivity as electrophilic cyanation reagent evaluated. The scalable preparation, easy handling and broad substrate scope of the electrophilic cyanation promoted by 9, which includes amines, thiols, silyl enol ethers, alkenes, electron rich (hetero)arenes and polyaromatic hydrocarbons, illustrate the synthetic potential of this reagent. Importantly, Lewis acid activation of the reagent is not
Dihalo(imidazolium)sulfuranes: A Versatile Platform for the Synthesis of New Electrophilic Group-Transfer Reagents
作者:Garazi Talavera、Javier Peña、Manuel Alcarazo
DOI:10.1021/jacs.5b05287
日期:2015.7.15
thioalkynes from dihalo(imidazolium) sulfuranes are reported and their reactivities as CN(+) and R-CC(+) synthons evaluated, respectively. The easy and scalable preparation of these electrophilic reagents, their operationally simple handling, broad substrate scope, and functional group tolerance clearly illustrate the potential of these species to become a reference for the direct electrophilic cyanation
Abstract An efficient and novel method for thiocyanation of aromatic and heteroaromatic compounds using trichloroisocyanuric acid/ammonium thiocyanate/wet SiO2 is described. GRAPHICAL ABSTRACT