Alcohols react with arenes in the presence of cationic iron(III) porphyrin catalyst. The reaction involves the formation of the C–C bond via dehydration, which is formal Lewis acid catalyzed Friedel–Craftsreaction.
for the synthesis of diarylmethine‐containing compounds. However, the methods developed to date for this purpose require a stoichiometric amount (usually more) of either a strong base or an oxidant. Reported here is the first catalytic benzylic C−H bond addition of diarylmethanes to styrenes and conjugated dienes. A potassium zincate complex, generated from potassium benzyl and zinc amide, acts as
Substituted Hantzsch esters can act as radical reservoirs in photoredox reactions, steadily releasing a carbon radical and a hydrogen atom radical in the absence of an additional electron acceptor. We propose that radical release by substituted Hantzsch esters occurs via a mechanism involving an internal redox cycle. Cinnamidecinnamides, styrenes, α,β‐unsaturated acids, and diarylethenes could be alkylated
Deaminative Arylation and Alkenyaltion of Aliphatic Tertiary Amines with Aryl and Alkenylboronic Acids via Nitrogen Ylides
作者:Jianke Su、Chengbo Li、Xinyuan Hu、Yu Guo、Qiuling Song
DOI:10.1002/anie.202212740
日期:2022.12.23
arylation and alkenylation of tertiary amines with aryl and alkenylboronic acids is enabled by difluorocarbene under transition-metal-free conditions. This protocol represents a novel reaction mode which succeeded in the construction of Csp3−Csp2 bonds via an in situ formed nitrogen ylide from tertiary amines (propargylamines, allylamines and 1H-indol-3-yl methane amines) and difluorocarbene with aryl and
在无过渡金属的条件下,二氟卡宾能够实现叔胺与芳基和烯基硼酸的有效且通用的脱氨芳基化和烯基化。该协议代表了一种新的反应模式,它通过叔胺(炔丙基胺、烯丙基胺和 1H-吲哚-3-基甲烷胺)和二氟卡宾原位形成的氮叶立德成功地构建了 C sp 3 -C sp 2键与芳基和烯基硼酸。
Chemoselective Three‐Component Geminal Cross Couplings of Dihaloalkanes with Cr Catalysis: Rapid Access to Tertiary and Quaternary Alkanes via a Metal–Carbene Intermediate
The three-component geminal couplings have been achieved by design of a chromium catalytic system using dihaloalkanes to selective react with organomagnesium and chlorosilanes/alkyl tosylates. These newly developed reactions are effective for rapidly forming tertiary and quaternary alkanes via a Cr carbene intermediate with a novel inner-sphere radical coupling mechanism, showing great potential in