with unfunctionalized ethers and amides was achieved in an atom-efficient and additive-free manner through the synergistic combination of photoredox and nickel catalysis. The protocol was effective with a wide range of internal alkynes, providing products in a highly selective fashion. Notably, the observed regioselectivity is complementary to conventional radical addition processes. Mechanistic investigations
Cp<sub>2</sub>ZrCl<sub>2</sub> – Et<sub>3</sub>Al reagent system in the homo-coupling of trimethylsilyl-substituted alkynes
作者:Ilfir R. Ramazanov、Rita N. Kadikova、Aliya K. Amirova、Oleg S. Mozgovoj、Usein M. Dzhemilev
DOI:10.1039/d1ra08268j
日期:——
The reaction of trimethylsilyl-substituted alkynes with 0.5 equivalents of Cp2ZrCl2 and 1 equivalent of Et3Al in toluene at room temperature for 18 hours gives, after hydrolysis/deuterolysis or iodination, functionalized products of the homo-coupling of silyl-substituted alkynes in good yield. Trimethylsilyl-substituted α,ω-diynes react with the Cp2ZrCl2 - Et3Al reagent system to give (1Z,2Z)-1,2-