An Improved Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides
作者:Jun Pan、Xinyan Wang、Yong Zhang、Stephen L. Buchwald
DOI:10.1021/ol202098h
日期:2011.9.16
A facile Pd-catalyzed conversion of aryl and vinyl triflates to aryl and vinyl halides (bromides and chlorides) is described. This method allows convenient access to a variety of aryl, heteroaryl, and vinyl halides in good to excellent yields and with greatly simplified conditions relative to our previous report.
Regiocontrolled Palladium-Catalyzed Arylative Cyclizations of Alkynols
作者:Daishi Fujino、Hideki Yorimitsu、Atsuhiro Osuka
DOI:10.1021/ja5029028
日期:2014.4.30
Tuning the reactivity of arylpalladium intermediates enables control of catalyticarylative 5-exo and 6-endo cyclizations of alkynols. The two modes of cyclizations represent a rare example of controllable, regioselective difunctionalization of alkynes. The cyclizations are useful in offering a divergent synthesis of oxygen-containing heterocycles, which is of synthetic use for further derivatization
FUNCTIONALIZED MAGNETIC NANOPARTICLE, A CATALYST, A METHOD FOR FORMING C-C BONDS
申请人:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
公开号:US20180099987A1
公开(公告)日:2018-04-12
A functionalized magnetic nanoparticle including an organometallic sandwich compound and a magnetic metal oxide. The functionalized magnetic nanoparticle may be reacted with a metal precursor to form a catalyst for various C—C bond forming reactions. The catalyst may be recovered with ease by attracting the catalyst with a magnet.
Achieving Vinylic Selectivity in Mizoroki-Heck Reaction of Cyclic Olefins
作者:Xiaojin Wu、Yunpeng Lu、Hajime Hirao、Jianrong Steve Zhou
DOI:10.1002/chem.201204427
日期:2013.5.3
In Heck reactions of cyclicolefins, the products usually have aryl groups that end up at the allylic and/or homoallylic position. We herein report new selectivity that adds aryl groups to the vinylic position. Cyclicolefins of various ring size worked well. The desired isomers were produced by palladium–hydride‐catalyzed isomerization of the initial products. Thus, a specific catalyst must be used
Bisphosphine oxides formed highlyactiveasymmetric Heck catalysts, which were applied in asymmetricsynthesis of pharmacologically active azacycles. Olefin insertion proceeded via cis pathways, different from P,N-ligands.