Hydrosulfonylation of Unactivated Alkenes by Visible Light Photoredox Catalysis
作者:Juan-Juan Wang、Wei Yu
DOI:10.1021/acs.orglett.9b03636
日期:2019.11.15
hydrosulfonylation of unactivated alkenes with sodium sulfinates was realized via [Ir(dF(CF3)ppy)2(dtbbpy)]PF6-mediated visiblelightphotoredoxcatalysis. The presence of an acid such as acetic acid is essential for the reaction to take place. A variety of unactivated alkenes can be transformed into sulfones with good yield and high regioselectivity using this reaction, which is proposed to proceed by a radical
Rapid Access to β-Trifluoromethyl-Substituted Ketones: Harnessing Inductive Effects in Wacker-Type Oxidations of Internal Alkenes
作者:Michael M. Lerch、Bill Morandi、Zachary K. Wickens、Robert H. Grubbs
DOI:10.1002/anie.201404712
日期:2014.8.11
We present a practical trifluoromethyl‐directed Wacker‐type oxidation of internalalkenes that enables rapidaccess to β‐trifluoromethyl‐substituted ketones. Allylic trifluoromethyl‐substituted alkenes bearing a wide range of functional groups can be oxidized in high yield and regioselectivity. The distance dependence of the regioselectivity was established by systematic variation of the number of
Mn-Catalysed photoredox hydroxytrifluoromethylation of aliphatic alkenes using CF<sub>3</sub>SO<sub>2</sub>Na
作者:Wenhao Long、Pengcheng Lian、Jingjing Li、Xiaobing Wan
DOI:10.1039/d0ob01322f
日期:——
This work demonstrated the photoinduced hydroxytrifluoromethylation of aliphaticalkenes catalysed by Mn(acac)3. The synthesis uses an inexpensive catalyst under mild reaction conditions, and exhibits a wide substrate scope and excellent functional group tolerance.
challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. In this study, we report a general and simple method for the manganese-catalysed dehydrosilylation and hydrosilylation of alkenes, with Mn2(CO)10 as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio