Synthesis of polychlorinated biphenyls (PCBs) using the Suzuki-coupling
摘要:
An improved synthesis of polychlorinated biphenyls (PCBs) utilizing a palladium-catalyzed cross-coupling reaction (Suzuki-coupling) is described. The coupling of (chlorinated) aryl boronic acids 1-3 with bromochlorobenzenes 4 using the standard conditions of the Suzuki-coupling gave the desired PCB congeners 5-7 in good to excellent yields. The self-coupling product of the aryl boronic acids is the major impurity of this reaction. 3,4,5-trichlorophenyl derivatives such as 10 can be synthesized by coupling of an aryl boronic acid with the corresponding bromochloroaniline 8. The approach offers the advantage of high selectivity and good yields compared to conventional methods such as the Cadogan reaction and allows the use of less toxic starting materials. (C) 2001 Elsevier Science Ltd. All rights reserved.
NOVEL STRATEGIES, LINKERS AND COORDINATION POLYMERS FOR HIGH-PERFORMANCE SORBENTS
申请人:Matzger Adam J.
公开号:US20090062498A1
公开(公告)日:2009-03-05
A linking ligand compound includes three bidentate chemical moieties distributed about a central chemical moiety. Another linking ligand compound includes a bidentate linking ligand and a monodentate chemical moiety. Coordination polymers include a plurality of metal clusters linked together by residues of the linking ligand compounds.
Novel Strategies, Linkers and Coordination Polymers for High-Performance Sorbents
申请人:THE REGENTS OF THE UNIVERSITY OF MICHIGAN
公开号:US20130237411A1
公开(公告)日:2013-09-12
A linking ligand compound includes three bidentate chemical moieties distributed about a central chemical moiety. Another linking ligand compound includes a bidentate linking ligand and a monodentate chemical moiety. Coordination polymers include a plurality of metal clusters linked together by residues of the linking ligand compounds.