.alpha.,.alpha.-Dichloroazoalkanes. I. Synthesis: Stereospecificity and side reactions. The crystal structure of 1,1'-dichloro-1,1'-diphenyl-1,1'-azopropane
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
Rhodium ion catalyzed decomposition of aryldiazoalkanes
作者:B.K.Ravi Shankar、Harold Shechter
DOI:10.1016/s0040-4039(00)87320-7
日期:1982.1
Aryldiazomethanes are converted by rhodium(II) acetate and iodorhodium(III) tetraphenylporphyrin to cis- rather than trans-1,2-diarylethylenes. Secondary aryldiazoalkanes react with rhodirum(II) acetate to give azines.
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.
One-pot synthesis of [1,2,4]Triazolo[1,5-a]pyridines from azines and benzylidenemalononitriles via copper-catalyzed tandem cyclization
作者:Jianguang Lv、Zhiqing He、Jianmin Zhang、Yuwei Guo、Ziwei Han、Xinhua Bao
DOI:10.1016/j.tet.2018.06.002
日期:2018.7
A simple and efficient copper-catalyzedtandem radical cyclization reaction has been discovered for the synthesis of triaryl [1,2,4]triazolo[1,5-a]pyridines from easily accessible azines and benzylidenmalononitriles. The new transformation involves multiple CH/CC bonds cleavage and CC/CN bonds formation, with extrusion of gaseous hydrogen and methane. A wide variety of substrates with different functional
已经发现了一种简单有效的铜催化串联自由基环化反应,用于从易于获得的嗪和苄叉亚甲基腈合成三芳基[1,2,4]三唑并[1,5- a ]吡啶。新的转化涉及多个C H / C C键断裂和C C / C N键形成,以及气态氢和甲烷的挤出。可以将具有不同官能团的多种底物以良好的产率转化为相应的产物。稠合的杂环具有强烈的蓝色荧光,具有大的笔划位移和高的量子产率。