Cp*Co(III)-catalyzed C H amidation of azines with dioxazolones
作者:Yanzhen Huang、Chao Pi、Zhen Tang、Yangjie Wu、Xiuling Cui
DOI:10.1016/j.cclet.2020.08.046
日期:2020.12
Abstract Cp*Co(III)-catalyzed direct C H amidation of azines has been developed. This conversion could proceed smoothly in the absence of external oxidants, acids or bases, with excellent regioselectivity and broad functional group tolerance. CO2 was released as the sole byproduct, thus providing an environmentally benign amidation process. The products obtained are important intermediates in organic
A rhodium-catalyzed sequential oxidativeC–H annulation reaction between ketazines and internal alkynes has been developed via C–H and N–N bond activation with air as an external oxidant, which led to an efficient approach toward isoquinolines with high atom efficiency at rt. Utilizing the distinctive reactivity of this catalysis, both N-atoms of the azines could be efficiently incorporated to the
Evaluation of the Extent of Conjugation in Symmetrical and Asymmetrical Aryl-Substituted Acetophenone Azines Using Electrochemical Methods
作者:Vittorio A. Sauro、Mark S. Workentin
DOI:10.1021/jo0056287
日期:2001.2.1
all cases, the formation of the radicalanion is completely reversible and the standard reduction potentials, Eo1-X/Y/1-X/Y.- could be determined. The reversibility of the second electron transfer is substituent dependent with certain dianions sufficiently basic to be protonated under our conditions. Standard reduction potentials (Eo1-X/Y/1-X/Y.-) for the formation of radicalanions exhibit a large
Ring and side chain formylated pyrazoles from acetophenone azines and Vilsmeier's reagent
作者:Ramaiyan Manikannan、Shanmugam Muthusubramanian
DOI:10.1002/jhet.576
日期:2011.5
Differently substituted acetophenoneazines on treatment with excess phosphorous oxychloride in N,N‐dimethylformamide have found to yield three products in each case. An acceptable mechanism has been suggested for the formation of all the three products. J. Heterocyclic Chem., (2011).
Direct one-potsynthesis of ketazines from secondary alcohols and hydrazinehydrate catalyzed by a ruthenium pincer complex is reported, which proceeds through O–H bond activation of secondary alcohols via amine–amide metal–ligand cooperation in the catalyst. Remarkably, liberated molecular hydrogen and water are the only byproducts.