A New Convenient Synthesis of Phosphoro(-no)Chloridothionates
摘要:
A general procedure for synthesis of phosphoro(-no)chlorides, particularly unsymmetrical ones, has been developed. The method involves the dealkylation of OTO-dialkyl phosphoro(-no)thionates 1 with dimethylamine and the chlorination of O-alkyl ammonium phosphoro(-no)thioates 2 using phosphorus oxychloride as a chlorinating agent.
Photocatalytic Deoxygenation of Sulfoxides Using Visible Light: Mechanistic Investigations and Synthetic Applications
作者:Aimee K. Clarke、Alison Parkin、Richard J. K. Taylor、William P. Unsworth、James A. Rossi-Ashton
DOI:10.1021/acscatal.0c00690
日期:2020.5.15
The photocatalytic deoxygenation of sulfoxides to generate sulfides facilitated by either Ir[(dF(CF3)ppy)2(dtbbpy)]PF6 or fac-Ir(ppy)3 is reported. Mechanistic studies indicate that a radical chain mechanism operates, which proceeds via a phosphoranyl radical generated from a radical/polar crossover process. Initiation of the radical chain was found to proceed via two opposing photocatalytic quenching
Reduction of CO<sub>2</sub> with NaBH<sub>4</sub>/I<sub>2</sub> for the Conversion of Thiophenols to Aryl Methyl Sulfides
作者:Bo Zhang、Zhengning Fan、Zhiqiang Guo、Chanjuan Xi
DOI:10.1021/acs.joc.9b01180
日期:2019.7.5
report a tandem reaction to realize reduction of carbon dioxide with thiophenols to generate aryl methyl sulfides under the NaBH4/I2 system with 18-crown-6 as the solvent. Thiophenols bearing electron-donating and electron-withdrawing groups are feasible in this reaction. Controlled experiment results indicate that 18-crown-6 plays a critical role in six-electron reduction of carbon dioxide.
我们报告了串联反应,以在18-crown-6作为溶剂的NaBH 4 / I 2系统下,用硫酚还原二氧化碳以生成芳基甲基硫醚。带有给电子基团和吸电子基团的硫酚在该反应中是可行的。对照实验结果表明18冠6在二氧化碳六电子还原中起关键作用。