Synthesis of β-Keto Sulfones<i>via</i>Coupling of Aryl/Alkyl Halides, Sulfur Dioxide and Silyl Enolates through Metal-Free Photoinduced C-X Bond Dissociation
作者:Xinxing Gong、Yechun Ding、Xiaona Fan、Jie Wu
DOI:10.1002/adsc.201700525
日期:2017.9.4
sulfonylative coupling of aryl/alkyl halides, DABCO⋅(SO2)2 (1,4‐diazabicyclo[2.2.2]octane‐sulfur dioxide), and silyl enolates under metal‐free conditions has been developed, giving rise to β‐keto sulfones in good yields. This transformation proceeds smoothly at room temperature under ultraviolet irradiation with good tolerance of various functional groups. Aryl iodides/bromides and alkyl halides are all good
Iron-catalyzed direct difunctionalization of alkenes with dioxygen and sulfinic acids: a highly efficient and green approach to β-ketosulfones
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Min Wu、Jinmao You、Hua Wang
DOI:10.1039/c4ob01369g
日期:——
A novel and efficient iron-catalyzed direct difunctionalization of alkenes with sulfinic acids and dioxygen for the synthesis of β-ketosulfones has been developed.
已开发出一种新颖高效的铁催化的烯烃直接二官能化反应,使用亚砜酸和二氧化硫合成β-酮磺酸盐。
PQS-enabled visible-light iridium photoredox catalysis in water at room temperature
作者:Mei-jie Bu、Chun Cai、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1039/c7gc03866f
日期:——
An amphoteric PQS-attached photocatalyst has been prepared that undergoes self-aggregation in water into nanomicelles. This covalently bound species enables Ir-based photoredoxcatalysis to be conducted in the absence of additives or co-solvents. Representative reactions are described using this new catalytic system, which require no additional investment of external energy in the form of heating or