convenient method for the copper(II)-catalyzed direct arylation of cyclic and nonaromatic enamides using diaryliodoniumsalts has been developed. The reaction demonstrates large functional group tolerance, good yields, and total regioselectivity with a C(3)-functionalization. The synthetic potential of this coupling was explored by using a range of readily accessible diaryliodoniumsalts and enamides.
O-Cyclopropyl hydroxylamines, now accessible via a novel and scalable synthetic route, have been demonstrated to be bench-stable and practicalprecursors for the synthesis of N-heterocycles via a di-heteroatom [3,3]-sigmatropic rearrangement. In order to study the reactivity of these compounds in depth, a robust synthesis of both ring-substituted and ring-unsubstituted O-cyclopropyl hydroxylamines has
Copper(<scp>i</scp>)-catalyzed intermolecular cyanoarylation of alkenes: convenient access to α-alkylated arylacetonitriles
作者:Xin-Jie Chen、Qing-Wen Gui、Rongnan Yi、Xianyong Yu、Zhi-Lin Wu、Ying Huang、Zhong Cao、Wei-Min He
DOI:10.1039/d0ob01055c
日期:——
A novel Cu(I)-catalyzedintermolecular cyanoarylation of alkenes with diaryliodonium salts as a radical arylating reagent and tetra-butylammonium cyanide as an electrophilic cyanating reagent was established. A broad range of α-alkylated arylacetonitriles were efficiently constructed in good to excellent yields under base- and oxidant-free and mild conditions.
A copper-catalyzed efficient method for the synthesis of a diverse variety of substituted N-aryl pyrazoles from readily available α,β-alkynic N-tosyl hydrazones and diaryliodonium triflates is realized. This one-pot multi-step methodology features a broad scope with good yields, scalability, and appreciable functional group tolerance. Detailed control experiments reveal that the reaction proceeds through
Transition-metal-free glycosyl sulfonation of diaryliodonium salts with sodium glycosyl sulfinate: an efficient approach to access glycosyl aryl sulfones
Glycosyl aryl sulfones have gained significant attention due to their diverse range of biological activities. However, a straightforward synthesis under mild conditions remains a challenging endeavor. This work presents the first transition-metal-free glycosyl sulfonation, employing a readily prepared sodium glycosyl sulfinate in conjunction with diaryliodonium salts. The method is compatible with