The atom‐economic and one‐pot regio‐ and stereoselective addition of sodiumarenesulfinates to either alkynes or alkenes can be achieved with an iron(III) chloride hexahydrate [FeCl3⋅6 H2O] catalytic system to afford β‐haloalkenyl and β‐chloroalkyl sulfones in moderate to good yields.
Heteroleptic Copper-Based Complexes for Energy-Transfer Processes: <i>E</i> → <i>Z</i> Isomerization and Tandem Photocatalytic Sequences
作者:Corentin Cruché、William Neiderer、Shawn K. Collins
DOI:10.1021/acscatal.1c01983
日期:2021.7.16
Energy-transfer processes involving copper complexes are rare. Using an optimized heteroleptic copper complex, Cu(bphen)(XantPhos)BF4, photosensitized E → Z isomerization of olefins is demonstrated. The XantPhos ligand afforded sensitizers with improved catalyst stability, while the bphen ligand lengthened the excited-state lifetime. A series of 25 di- and trisubstituted alkenes underwent photoisomerization
Iron Halide-Mediated Regio- and Stereoselective Halosulfonylation of Terminal Alkynes with Sulfonylhydrazides: Synthesis of (<i>E</i>)-β-Chloro and Bromo Vinylsulfones
Halosulfonylation of terminal alkynes was achieved with sulfonylhydrazides as the sulfonyl precursor and inexpensive iron halide as halide source in the presence TBHP, allowing the regio- and stereoselective generation of (E)-beta-chloro and bromo vinylsulfones.