Thermal Rearrangement of Sulfamoyl Azides: Reactivity and Mechanistic Study
作者:Xiaodong Zou、Jiaqi Zou、Lizheng Yang、Guigen Li、Hongjian Lu
DOI:10.1021/acs.joc.7b00308
日期:2017.5.5
The rearrangement of sulfamoyl azides under thermal conditions to form a C–C bond while breaking two C–N bonds is reported. Mechanisticstudy shows that this reaction goes through a Curtius-type rearrangement to form a 1,1-diazene, then which rearranges possibly through both a concerted rearrangement process and a stepwise radical process. This rearrangement could be used in the synthesis of complex
A photoredox-assisted reductiveacyl cross-coupling reaction of two different carboxylic acid esters was developed for ketone synthesis. The reaction proceeded smoothly under mild conditions using Hantzsch ester (HE) as an organic reductant, with high chemoselectivity and functional group compatibility. A large range of aryl and 1°, 2°, 3°-acyl electrophiles, and 1°, 2°, 3°-alkyl radical precursors
Nickel-catalyzed anti-Markovnikov hydroarylation of alkenes
作者:Julia Nguyen、Andrea Chong、Gojko Lalic
DOI:10.1039/c8sc05445b
日期:——
We have developed a nickel-catalyzed hydroarylation of alkenesusing aryl halides as coupling partners. Excellent anti-Markovnikov selectivity is achieved with aryl-substituted alkenes and enol ethers. We also show that hydroarylation occurs with alkyl substituted alkenes to yield linear products. Preliminary examination of the reaction mechanism suggests irreversible hydrometallation as the selectivity
Nickel-Catalyzed Regiodivergent Reductive Hydroarylation of Styrenes
作者:Yuli He、Shaolin Zhu、Yuhang Xue、Jian Chen、Peihong Song
DOI:10.1055/a-1523-3228
日期:2021.10
We report a ligand-controlled nickel-catalyzed reductive hydroarylation of styrenes with predictable and controllable regioselectivity. With a diamine ligand, the reaction produces selective linear hydroarylation products. Alternatively, with a chiral PyrOx ligand, branch-selective enantioenriched 1,1-diarylalkane products are obtained. Preliminary mechanistic results are consistent with a reductive