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.
A new concept for the meta‐selective borylation of aromatic amides is described. It has been demonstrated that while esters gave para borylations, amides lead to meta borylations. For achieving high meta selectivity, an L‐shaped bifunctional ligand has been employed and engages in an O⋅⋅⋅K noncovalent interaction with the oxygen atom of the moderately distorted amide carbonyl group. This interaction
The ortho- and monoselective Cp*Rh(III)-catalyzed chlorination of a broad range of benzenederivatives and electron-rich heterocycles under mild reaction conditions is reported. Inexpensive and commercially available N-chloro-imides could be used as chlorinating agents in as low as substoichiometric quantities. Furthermore, two different reaction protocols were developed to allow for the use of substrates
Versatile ruthenium(ii)-catalyzed C–H cyanations of benzamides
作者:Weiping Liu、Lutz Ackermann
DOI:10.1039/c3cc49502g
日期:——
Direct cyanations of arenes and heteroarenes bearing only weakly coordinating amides were accomplished using a robust ruthenium(II) catalyst. The user-friendly C(sp2)âH activation occurred with the assistance of carboxylate with high site-selectivity, excellent functional group tolerance and ample scope.
NMR and X-ray Studies of Hydrogen Bonding for Amide-Containing Silanediols
作者:Sean O. Wilson、Ngon T. Tran、Annaliese K. Franz
DOI:10.1021/om300736n
日期:2012.10.8
amido-silanediols based on the parameters (e.g., sterics, hybridization, and ring size of hydrogenbonding) that affect intra- and intermolecular hydrogenbonding. Pyridine binding studies demonstrate that these conformational effects have implications for the existence of single versus multiple modes of hydrogenbonding.