Ruthenium-catalyzed ortho-C–H halogenations of benzamides
作者:Lianhui Wang、Lutz Ackermann
DOI:10.1039/c3cc47852a
日期:——
[Ru3(CO)12] and AgO2C(1-Ad) enabled the first ruthenium-catalyzed intermolecular halogenations of arenes via CâH activation. Thereby, brominations and iodinations of electron-rich and electron-deficient benzamides were achieved in a highly selective fashion.
First asymmetric synthesis of planar chiral [2.2]metacyclophanes
作者:Marco Blangetti、Helge Müller-Bunz、Donal F. O'Shea
DOI:10.1039/c3cc42275e
日期:——
A general three step asymmetric synthesis of planar chiral [2.2]metacyclophanes utilizing selective benzylic and aryl metalations is described. The final enantioselective step is achieved using a (-)-sparteine mediated aryl metalation, following which electrophile reaction gives planar chiral cyclophanes with enantiomeric ratios (er) above 90 : 10.