Methods for the selective borylation of arenes, including arenes substituted with an electron-withdrawing group (e.g., 1-chloro-3-fluoro-2-substituted benzenes) are provided. The methods can be used, in some embodiments, to efficiently and regioselectively prepare borylated arenes without the need for expensive cryogenic reaction conditions.
[EN] METHODS FOR PRODUCING BORYLATED ARENES<br/>[FR] PROCÉDÉS POUR PRODUIRE DES ARÈNES BORYLÉS
申请人:DOW AGROSCIENCES LLC
公开号:WO2015035217A1
公开(公告)日:2015-03-12
Methods for the selective borylation of arenes, including arenes substituted with an electron-withdrawing group (e.g., 1-chloro-3-fluoro-2-substituted benzenes) are provided. The methods can be used, in some embodiments, to efficiently and regioselectively prepare borylated arenes without the need for expensive cryogenic reaction conditions.
Protonation Studies of Reduced Ruthenium(II) Complexes with Polypyridyl Ligands
作者:Peter A. Anderson、Robert F. Anderson、Masaoki Furue、Peter C. Junk、F. Richard Keene、Bradley T. Patterson、Brett D. Yeomans
DOI:10.1021/ic991070d
日期:2000.6.1
The pKa values associated with protonation of the one-electron reduced forms of series of [L'2Ru(II)L]2+ complexes [L' = bidentate polypyridyl ligand; L = bidentate polypyridyl ligand with additional uncoordinated N atoms in the aromatic ring system: e.g., dpp = 2,3-bis(2-pyridyl)pyrazine, bpz = 2,2'-bipyrazine] were assessed using pulse radiolysis techniques by the measurement of spectral variations
Methods for the selective borylation of arenes, including arenes substituted with an electron-withdrawing group (e.g., 1-chloro-3-fluoro-2-substituted benzenes) are provided. The methods can be used, in some embodiments, to efficiently and regioselectively prepare borylated arenes without the need for expensive cryogenic reaction conditions.
Improved synthesis of electron deficient bipyridines
作者:Hao Li、Jossian Oppenheimer、Milton R. Smith、Robert E. Maleczka
DOI:10.1016/j.tetlet.2016.04.023
日期:2016.5
Symmetric bipyridines commonly serve as ligands for various types of catalytic processes. Nickel catalyzed Ullmann couplings are often used to prepare such bipyridines, however for electrondeficient substrates low conversions and/or yields are often reported. We herein report an improved synthesis of trifluoromethyl substituted bipyridines using stoichiometric amounts of Zn(0), NiCl2·6H2O, and Ph3P