Copper-Catalyzed Direct Benzylation or Allylation of 1,3-Azoles with <i>N</i>-Tosylhydrazones
作者:Xia Zhao、Guojiao Wu、Yan Zhang、Jianbo Wang
DOI:10.1021/ja111249p
日期:2011.3.16
Cu-catalyzed cross-coupling of N-tosylhydrazones with 1,3-azoles leads to the direct C-H benzylation or allylation. Cu carbene migratory insertion is proposed to play the key role in this transformation.
Synthesis of Alkenylboronates from <i>N</i>-Tosylhydrazones through Palladium-Catalyzed Carbene Migratory Insertion
作者:Yifan Ping、Rui Wang、Qianyue Wang、Taiwei Chang、Jingfeng Huo、Ming Lei、Jianbo Wang
DOI:10.1021/jacs.1c02331
日期:2021.7.7
The palladium-catalyzed oxidative borylation reaction of N-tosylhydrazones has been developed. The reaction features mild conditions, broad substratescope, and good functional group tolerance. It thus represents a highly efficient and practical method for the synthesis of di-, tri-, and tetrasubstituted alkenylboronates from readily available N-tosylhydrazones. One-pot Suzuki coupling and other transformations
The Pd‐catalyzed reaction between 2,2′‐dibromobiphenyls and related systems with tosylhydrazones gives rise to new π‐extendedconjugatedpolycarbo‐ and heterocyclesthrough an autotandem process involving a cross‐coupling reaction followed by an intramolecular Heck cyclization. The reaction shows wide scope regarding both coupling partners. Cyclic and acyclic tosylhydrazones can participate in the
One-pot synthesis of S-alkyl dithiocarbamates via the reaction of N-tosylhydrazones, carbon disulfide and amines
作者:Qiang Sha、Yun-Yang Wei
DOI:10.1039/c3ob40745d
日期:——
A new, convenient and efficient transition metal-free synthesis of S-alkyl dithiocarbamates through one-pot reaction of N-tosylhydrazones, carbon disulfide and amines is reported. Tosylhydrazones derived from various aromatic and aliphatic ketones or aldehydes were tested and gave dithiocarbamates in good to excellent yields. The tosylhydrazones can be generated in situ without isolation, which provides
Palladium-Catalyzed Multi-Component Reactions of<i>N</i>-Tosylhydrazones, 2-Iodoanilines and CO<sub>2</sub>towards 4-Aryl-2-Quinolinones
作者:Song Sun、Wei-Ming Hu、Ning Gu、Jiang Cheng
DOI:10.1002/chem.201604256
日期:2016.12.23
A palladium‐catalyzed three‐component reaction between N‐tosylhydrazones, 2‐iodoanilines and atmospheric pressure CO2 was developed whereby a tandem carbene migration insertion/lactamization strategy afforded 4‐aryl‐2‐quinolinones in moderate to good yields. Notably, a wide range of functional groups were tolerated in this procedure. This protocol features the simultaneous formation of four novel bonds;