Functionalized β-keto sulfones were prepared under the synergistic interactions of visible light irradiation, Ru(bpy)3Cl2, oxygen, KI, and NaOAc basic additive.
$$\hbox Cu}^2+}$$ -doped zeolitic imidazolate framework-8 (ZIF-8)-catalyzed one-pot procedure to synthesize $$\upbeta $$ -keto and vinyl sulfones by the direct oxysulfonylation and hydrosulfonylation of alkynes via radical reaction under mild conditions has been described. The advantages of this protocol included broad substrate scope and excellent $$\upbeta $$ -keto and E-stereoselectivity. The Cu/ZIF-8 catalyst not only exhibited excellent performance but also had a great stability in the reaction, successfully allowing its reuse up to five cycles. This efficient Cu/ZIF-8 heterogeneous catalyst is explored for the first time to generate $$\upbeta $$ -keto and vinyl sulfones. $$\hbox Cu}^2+}$$ -doped zeolitic imidazolate framework-8 (ZIF-8)-catalyzed one-pot procedure to synthesize $$\upbeta $$ -keto and vinyl sulfones by the direct oxysulfonylation and hydrosulfonylation of alkynes via radical reaction under mild conditions is described. The advantages of this protocol included broad substrate scope and excellent $$\upbeta $$ -keto and E-stereoselectivity. This efficient Cu/ZIF-8 heterogeneous catalyst is explored for the first time for C-S bond formation.
Photocatalytic aerobic thiocyanation/sulfonylation of alkynes by D-A type COFs: Enhanced generation of superoxide and sulfur-based radicals via building units adjusted band structures
作者:Jincong Yuan、Lingjuan Zhang、Xian-Ming Zhang
DOI:10.1016/j.jcat.2023.115258
日期:2024.1
Metal‐Free Electrochemical Coupling of Vinyl Azides: Synthesis of Phenanthridines and
<i>β</i>
‐Ketosulfones
An efficient and environmentally benign synthesis of phenanthridine by electrochemically oxidative cyclocoupling of biaryl vinyl azide with sodium azide and benzenesulfonyl hydrazide, respectively, is reported. The reaction is carried out in undivided cell at room temperature, without additional metal‐catalysis or exogenous oxidant.