Electrophilic Vinylation of Thiols under Mild and Transition Metal‐Free Conditions
作者:Laura Castoldi、Ester Maria Di Tommaso、Marcus Reitti、Barbara Gräfen、Berit Olofsson
DOI:10.1002/anie.202002936
日期:2020.9
methodology displays high functional group tolerance and proceeds under mild and transition metal‐free conditions without the need for excess substrate or reagents. Mercaptothiazoles could be vinylated under modified conditions, resulting in opposite stereoselectivity compared to previous reactions with vinyliodonium salts. Novel VBX reagents with substituted benziodoxolonecores were prepared, and improved
Stereoselective Formation of<i>Z</i>- or<i>E</i>-Vinyl Thioethers from Arylthiols and Acetylenes under Transition-Metal-Free Conditions
作者:Yunfeng Liao、Shanping Chen、Pengcheng Jiang、Hongrui Qi、Guo-Jun Deng
DOI:10.1002/ejoc.201300727
日期:2013.10
Vinyl sulfide formation with good yield and high regio- and stereoselectivities from thiols and acetylenesunder transition-metal-free conditions is described. Potassium phosphate was used as an effective additive to enhance the reaction yield and selectivity. Z-Vinyl sulfides were predominately formed in the presence of potassium phosphate, whereas E-vinyl sulfides were formed under solvent- and base-free