Microwave-Accelerated Iridium-Catalyzed Borylation of Aromatic C−H Bonds
作者:Peter Harrisson、James Morris、Todd B. Marder、Patrick G. Steel
DOI:10.1021/ol901306m
日期:2009.8.20
accelerates the Ir-catalyzed C−H borylation of aromatic substrates when compared with reactions carried out at the same temperature under standard heating conditions. Application to a one-pot single solvent process for tandem C−H borylation/Suzuki−Miyauracross-coupling sequences using microwave-accelerated reactions gives fast and efficient access to a wide range of biaryl and heterobiaryl compounds.
Iridium-catalyzed borylation of thiophenes: versatile, synthetic elaboration founded on selective C–H functionalization
作者:Ghayoor A. Chotana、Venkata A. Kallepalli、Robert E. Maleczka、Milton R. Smith
DOI:10.1016/j.tet.2008.02.111
日期:2008.6
various substituted thiophenes to synthesize poly-functionalized thiophenes in good to excellent yields. Apart from common functionalities compatible with iridium-catalyzed borylations, additional functional group tolerance to acyl (COMe), and trimethylsilyl (TMS) groups was also observed. High regioselectivities were observed in borylation of 3-and 2,5-di-substituted thiophenes. Electrophilic aromatic
Metal-free halogenation of arylboronate with N-halosuccinimide
作者:Toshiyuki Kamei、Aoi Ishibashi、Toyoshi Shimada
DOI:10.1016/j.tetlet.2014.06.003
日期:2014.7
Efficient bromination and chlorination of aryl pinacol boronates were accomplished without the addition of metal reagent. The reaction proceeded efficiently with electron-rich arylboronates or heteroarylboronates in DMF or acetonitrile, to afford mono-, di-, or trihalogenated aryl pinacol boronates.