A palladium(II)-catalyzed hydroboration of aryl alkenes with stable and easy-to-handle (pinacolato)diboron (B2pin2) under mild conditions has been developed. Acetic acid acted as the solvent and the hydrogen source, which has been identified by deuterium experiments. Notably, isomerization–hydroboration of allyl benzene derivatives was observed. As a result, a series of benzyl boronic esters were obtained
Copper-Catalyzed Ligand-Free Diazidation of Olefins with TMSN<sub>3</sub> in CH<sub>3</sub>CN or in H<sub>2</sub>O
作者:Huan Zhou、Wujun Jian、Bo Qian、Changqing Ye、Daliang Li、Jing Zhou、Hongli Bao
DOI:10.1021/acs.orglett.7b02982
日期:2017.11.17
An environmentally benign, copper-catalyzed diazidation of a broad range of olefins, including vinylarenes, unactivated alkenes, allene, and dienes, under mild conditions with TMSN3 (trimethylazidosilane) as azido source, has been developed. This reaction can be carried out in organic solvent or in aqueous solution where water is the sole solvent. The functional group compatibility of this reaction
Organocatalytic Olefin Aziridination via Iminium-Catalyzed Nitrene Transfer: Scope, Limitations, and Mechanistic Insight
作者:Shea L. Johnson、Michael K. Hilinski
DOI:10.1021/acs.joc.9b01023
日期:2019.7.5
Olefin aziridination via organocatalytic nitrene transfer offers potential complementarity to metal-catalyzed methods; however there is a lack of reports of such reactions in the literature. Herein is reported a method that employs an iminium salt to catalyze the aziridination of styrenes by [ N-( p-toluenesulfonyl)imino]phenyliodinane (PhINTs). These reactions are hypothesized to proceed via a diaziridinium
Selective Functionalization of Arenes through the Reaction of Aryne-Zirconocene Complexes and Enol Ethers
作者:José Barluenga、Amadeo Fernández、Lucía Álvarez-Rodrigo、Félix Rodríguez、Francisco J. Fañanás
DOI:10.1055/s-2005-872699
日期:——
A new method for the selective functionalization of aromatic rings by the zirconium promoted cross coupling reaction of an aryllithium compound and an enol ether is reported. Formation of an aryne-zirconocene complex and its regioselective coupling with an enol ether are the key steps of the process. This methodology allows the synthesis of functionalized styrene or Z-alkenol derivatives from simple