Toward Polynuclear Ru–Cu Catalytic Dehydrogenative C–N Bond Formation, on the Reactivity of Carbazoles
作者:Marie-Laure Louillat、Frederic W. Patureau
DOI:10.1021/ol303216u
日期:2013.1.4
The cooperative action of Ru and Cu catalysts enables direct polynuclear C–H and N–H activation for the dehydrogenative N-carbazolation of carbazoles, selectively at the C1 position. Initial mechanistic experiments are presented and discussed.
Carbonyl Carbon and Nitrogen Chemical Shift Tensors of the Amide Fragment of Acetanilide and N-Methylacetanilide
作者:Michael D. Lumsden、Roderick E. Wasylishen、Klaus Eichele、Michael Schindler、Glenn H. Penner、William P. Power、Ronald D. Curtis
DOI:10.1021/ja00083a028
日期:1994.2
Both carbon-13 and nitrogen-15solid-stateNMR spectroscopy have been employed to characterize the carbonyl carbon and nitrogen chemical shift (CS) tensors of the amide fragment of (Z)-acetanilide (I) and (E)-N-methylacetanilide (II). These two related compounds exhibit very different structural features in the solid state, as shown by previous X-ray diffraction studies. The orientation of the principal
Deuterium REDOR: Principles and Applications for Distance Measurements
作者:I. Sack、A. Goldbourt、S. Vega、G. Buntkowsky
DOI:10.1006/jmre.1999.1710
日期:1999.5
observable by X-2H REDOR is enlarged toward weaker couplings, i.e., larger distances. From these experiments the 2H-15N dipolar coupling between the amino deuteron and the amino nitrogen and the 2H-13C dipolar couplings between the amino deuteron and the alpha and beta carbons have been elucidated and the corresponding distances have been determined. The distance data from REDOR are in good agreement
Hypervalent Iodine(III)-Promoted Phenyl Transfer Reaction from Phenyl Hydrazides to Nitriles
作者:Yan Yan、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Nana Ma、Qingfeng Liu
DOI:10.1021/acs.joc.7b01215
日期:2017.8.4
nitriles to N-phenyl amides has been achieved through a novel intermolecular phenyl transfer reaction from phenyl hydrazides and N-addition to nitriles in the presence of PIFA under mild and solvent-free conditions. This cross-coupling reaction includes the oxidative cleavage of sp2 C–N bonds of phenyl hydrazides to form a phenyl radical and the subsequent N-addition to cyanos to form new sp2 C–N bonds
Effects of polymorphic differences for sulfanilamide, as seen through13C and15N solid-state NMR, together with shielding calculations
作者:Alessia Portieri、Robin K. Harris、Richard A. Fletton、Robert W. Lancaster、Terence L. Threlfall
DOI:10.1002/mrc.1351
日期:2004.3
We recorded both carbon‐13 and nitrogen‐15 NMR spectra of the three solid forms of sulfanilamide most commonly known. This study led to an interpretation of the solid‐state effectsseen in cross‐polarization magic angle spinning spectra. Relaxation times for the different forms were measured. These show different behaviour for the three forms, arising from mobility variations. To obtain information