Scalable, Metal- and Additive-Free, Photoinduced Borylation of Haloarenes and Quaternary Arylammonium Salts
作者:Adelphe M. Mfuh、John D. Doyle、Bhuwan Chhetri、Hadi D. Arman、Oleg V. Larionov
DOI:10.1021/jacs.6b01376
日期:2016.3.9
We report herein a simple, metal- and additive-free, photoinduced borylation of haloarenes, including electron-rich fluoroarenes, as well as arylammoniumsalts directly to boronic acids. This borylation method has a broad scope and functional group tolerance. We show that it can be further extended to boronic esters and carried out on gram scale as well as under flow conditions.
Desulfonative pd-catalyzed coupling of aryl trifluoroborates with arylsulfonyl chlorides
作者:Zhen Wei、Dazhong Xue、Haisheng Zhang、Jinyu Guan
DOI:10.1002/aoc.3504
日期:2016.9
Pd‐catalyzed cross‐coupling of aryl trifluoroborates with arylsulfonyl chlorides has been successfully achieved. This transformation is a new method for the Suzuki–Miyaura‐type reaction of aryl trifluoroborates via the cleavage of C S bond, thus providing an alternative synthesis of biaryls. The reported cross‐couplingreactions are tolerant to many common functional groups regardless of electron‐donating or
Palladium-Catalyzed Borylation of Aryl and Heteroaryl Halides Utilizing Tetrakis(dimethylamino)diboron: One Step Greener
作者:Gary A. Molander、Sarah L. J. Trice、Steven M. Kennedy
DOI:10.1021/ol302124j
日期:2012.9.21
borylating agent, tetrakis(dimethylamino)diboron [(Me2N)2B–B(NMe2)2], is reported. The method is complementary to the previously reported method utilizing bis-boronic acid (BBA) in that certain substrates perform better under one set of optimized reaction conditions than the other. Because tetrakis(dimethylamino)diboron is the synthetic precursor to both BBA and bis(pinacolato)diboron (B2Pin2), the new
Scope of the Palladium-Catalyzed Aryl Borylation Utilizing Bis-Boronic Acid
作者:Gary A. Molander、Sarah L. J. Trice、Steven M. Kennedy、Spencer D. Dreher、Matthew T. Tudge
DOI:10.1021/ja303181m
日期:2012.7.18
wasteful reagents to prepare boronic acid derivatives and require additional steps to afford the desired boronic acid. The scope of the previously reported palladium-catalyzed, direct boronic acid synthesis is unveiled, which includes a wide array of synthetically useful aryl electrophiles. It makes use of the newly available second generation Buchwald XPhos preformed palladium catalyst and bis-boronic
A modified procedure for the palladium catalyzed borylation/Suzuki-Miyaura cross-coupling of aryl and heteroaryl halides utilizing bis-boronic acid
作者:Gary A. Molander、Sarah L.J. Trice、Brittany Tschaen
DOI:10.1016/j.tet.2015.04.026
日期:2015.9
A modified Pd-catalyzed method of forming aryl- and heteroarylboron species and a two-step, one-pot borylation/Suzuki-Miyaura cross coupling using the atom economical tetrahydroxydiboron (bis-boronic acid, BBA) is reported. By using ethylene glycol as an additive, the new method results in increased yields, lower BBA loading, faster reaction times, and a broader reaction scope, including previously