The use of vinyl electrophiles in synthesis has been hampered by the lack of access to a suitable reagent that is practical and of appropriate reactivity. In this work we introduce a vinyl thianthrenium salt as an effective vinylating reagent. The bench-stable, crystalline reagent can be readily prepared from ethylene gas at atmospheric pressure in one step and is broadly useful in the annulation chemistry
Palladium-Catalyzed Aminocarbonylation of<i>N</i>-Chloroamines with Boronic Acids
作者:Wanfang Li、Xiao-Feng Wu
DOI:10.1002/chem.201500779
日期:2015.5.11
synthetic points of view, the carbonylative transformation of NX bonds represents an interesting and attractive area of investigation. In light of this, the first carbonylative cross‐coupling between N‐chloroamines and organoboronic acids has been developed. This new type of aminocarbonylation proceeds at mild temperatures (45–55 °C) with 2 mol % Pd/C (10 wt %) as the ligand‐free catalyst. Not only arylboronic
Copper-Catalyzed Trifluoromethylthio-arylsulfonylation of Styrene Derivatives via the Insertion of Sulfur Dioxide
作者:Gang Chen、Jie Xu、Baojian Xiong、Hongzhuo Song、Xuemei Zhang、Xuelei Ma、Zhong Lian
DOI:10.1021/acs.orglett.1c04371
日期:2022.2.11
A copper-catalyzed four-component trifluoromethylthio-arylsulfonylation between styrene derivatives, AgSCF3, aryldiazonium tetrafluoroborates, and ex situ generated sulfur dioxide (from SOgen) is presented. This reaction features mild reaction conditions, good functional group tolerance, a broad substrate scope, good yields, and excellent diastereoselectivity. Preliminary mechanistic studies revealed
Palladium‐Catalyzed Desulfurative Amide Formation from Thioureas and Arylboronic Acids
作者:Jianke Su、Wendong Li、Xin Li、Jian Xu、Qiuling Song
DOI:10.1002/cctc.202001099
日期:2020.11.19
Pd‐catalyzed desulfurative amide formation involved Suzuki‐Miyaura coupling reaction, notably the Pd complex was generated in situ from thioureas, Ag salt and Pd catalyst. Silver salt was essential for the construction of this type of carbenes from available and stable thioureas and well participated in the catalytic cycle. We report a method for the synthesis of arylamides from arylboronicacids, which
A novel copper-catalyzed carbonylative cross-coupling between N-chloroamines and arylboronicsacids has been developed. With copper(I) oxide as the catalyst, various desired amide compounds were produced in moderate to good yields. Functionalgroups such as iodide and alkene are tolerated. Notably, this is the first example of a copper-catalyzed aminocarbonylation with N-chloroamines.