砜是令人着迷且广泛使用的官能团,但目前的合成仍然存在局限性。在此,报道了一种针对砜[( E )-烯丙基砜和α-磺酰甲基苯乙烯]的区域分散的无过渡金属方法。该方法使用市售烯烃、碱、添加剂、溶剂和亚磺酸钠(RSO 2 Na)并以良好的产率生产加合物。考虑到发生多达 4 个反应(溴化、脱芳香重排、E2 和 S N 2),这种方法非常有效。关键加合物的结构通过X射线晶体学证实。
Visible-light-induced surfactant-promoted sulfonylation of alkenes and alkynes with sulfonyl chloride by the formation of an EDA-complex with NaI in water at room temperature
scope, good functional group tolerance, simple operation, scalability and high chemical selectivity. Thus, it not only provided a green and efficient synthetic strategy for the preparation of β-iodo-substituted sulfone derivatives, but also enriched the investigation of visible-light-induced reactions in water.
protocol was developed for the preparation of allylic sulfones through direct condensation of sodium arylsulfinates and β,β-disubstituted nitroalkenes. The key step of this process was the Lewis base-promoted equilibrium between nitroalkenes and allylic nitro compounds. Through this process, the readily available conjugated nitroalkenes can be easily converted into allylic nitro compounds, which contain
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.
Visible-light photoredox-promoted desilylative allylation of α-silylamines: An efficient route to synthesis of homoallylic amines
作者:Lulu Fan、Fukun Cheng、Tingting Zhang、Guoxing Liu、Jinwei Yuan、Pu Mao
DOI:10.1016/j.tetlet.2021.153357
日期:2021.9
desilylative allylation of α-silylamines with allylic sulfones is described. A variety of α-silylamines derived from anilines, cyclic and acyclic alkyl amines reacted with a serious of mono or disubstituted allylic sulfones well to provide homollylic amines in good to highyields under very mild reaction conditions.