Selectivity control in thiol–yne click reactions <i>via</i> visible light induced associative electron upconversion
作者:Julia V. Burykina、Nikita S. Shlapakov、Evgeniy G. Gordeev、Burkhard König、Valentine P. Ananikov
DOI:10.1039/d0sc01939a
日期:——
An associative electron upconversion is proposed as a key step determining the selectivity of the thiol–yne coupling.
提出了一种关联电子上转换作为决定硫醇-炔偶联选择性的关键步骤。
Pd-Catalyzed Alkenyl Thioether Synthesis from Thioesters and <i>N</i>-Tosylhydrazones
作者:Kota Ishitobi、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/acscatal.9b04212
日期:2019.12.6
A Pd-catalyzed alkenyl thioethersynthesis was achieved using thioesters and N-tosylhydrazones as starting materials. The thioester acted as an efficient “sulfur source” for catalytic C–S bond formation using N-tosylhydrazone. This method gave Z-alkenyl thioethers with high diastereoselectivity (up to 99:1 diastereomeric ratio). This transformation displayed a wide functional group tolerance and was
Electrophilic Activation of S−Si Reagents by Silylium Ions for Their Regio‐ and Diastereoselective Addition Across C−C Multiple Bonds
作者:Honghua Zuo、Elisabeth Irran、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1002/anie.202401599
日期:2024.4.8
An in situ-generated bissilylated sulfonium ion is the actual catalyst in highlyregio- and diastereoselectiveaddition reactions of thiosilanes across the C−C multiple bonds of alkynes and allenes, respectively (see scheme). These thiosilylation reactions enable the direct installation of two orthogonal linchpins for further chemoselective functional-group manipulation.