Copper-Catalyzed Decarboxylative Functionalization of Conjugated β,γ-Unsaturated Carboxylic Acids
作者:Wei Zhang、Chengming Wang、Qiu Wang
DOI:10.1021/acscatal.0c03621
日期:2020.11.20
Copper-catalyzed decarboxylative coupling reactions of conjugated β,γ-unsaturated carboxylic acids have been achieved for allylic amination, alkylation, sulfonylation, and phosphinoylation. This approach was effective for a broad scope of amino, alkyl, sulfonyl, and phosphinoyl radical precursors as well as various conjugated β,γ-unsaturated carboxylic acids. These reactions also feature high regioselectivity
Visible-light induced oxidant-free oxidative cross-coupling for constructing allylic sulfones from olefins and sulfinic acids
作者:Guoting Zhang、Lingling Zhang、Hong Yi、Yi Luo、Xiaotian Qi、Chen-Ho Tung、Li-Zhu Wu、Aiwen Lei
DOI:10.1039/c6cc04109d
日期:——
An oxidant-free dehydrogenative sulfonylation of [small alpha]-methyl-styrene derivatives was developed for the construction of allylic sulfones by using eosin Y as a photosensitizer in conjunction with a cobaloxime catalyst. The process...
Tetrabutylammonium iodide catalyzed allylic sulfonylation of α-methyl styrene derivatives with sulfonylhydrazides
作者:Xiaoqing Li、Xiangsheng Xu、Can Zhou
DOI:10.1039/c2cc36960e
日期:——
Sulfonyl radicals generated from sulfonylhydrazides by the Bu4NIâtert-butyl hydroperoxide (TBHP) catalysis system underwent addition to a variety of α-methyl styrene derivatives to give the corresponding allylic sulfones. This selective allylic sulfonylation is metal-free, operationally simple, and environmentally friendly.
A novel iodine-catalyzed functionalization of a variety of olefins and alkynes and direct decarboxylative functionalization of cinnamic and propiolic acids with TosMIC to provide access to various vinyl, allyl, and beta-iodo vinylsulfones is described. This simple, efficient, and environmentally benign approach employing inexpensive molecular iodine as a catalyst demonstrates a versatile protocol for the synthesis of highly valuable sulfones, rendering it attractive to both synthetic and medicinal chemistry.