85191-50-0Relevant academic research and scientific papers
Synthesis of (E)-2-Alkenylazaarenes via Dehydrogenative Coupling of (Hetero)aryl-fused 2-Alkylcyclic Amines and Aldehydes with a Cobalt Nanocatalyst
Zhou, Changjian,Tan, Zhenda,Jiang, Huanfeng,Zhang, Min
, p. 2887 - 2892 (2018/05/03)
To date, the synthesis of (E)-2-alkenylazaarenes via the condensation of 2-methyl N-heteroarenes with aldehydes or their equivalents has been well demonstrated. However, the direct formation of such a class of useful compounds from extensively distributed 2-alkylcyclic amine motifs remains an unresolved goal. Herein, by employing the nitrogen-silica-doped carbon (Vulcan XC-72R) as the support, we have developed a low-loading cobalt nanocatalyst (Co/N-Si-C). The combination of such a catalyst with p-nitrobenzoic acid and molecular O2 exhibits excellent catalytic performance towards the dehydrogenative coupling of (hetero)aryl-fused 2-alkylcyclic amines with aldehydes to afford the (E)-2-alkenylazaarenes. In the reaction, effective capture of the partially dehydrogenated cyclic amine motifs appears to be the key strategy to address the issue of the chemoselectivity. The developed catalytic transformation proceeds with the merits of broad substrate scope, good functional group tolerance, high atom-efficiency, use of an earth-abundant and reusable cobalt catalyst and molecular O2 as a green oxidant, which offers an important basis for the direct conversion of inert cyclic amine units into the functional frameworks.
Substituted 1,8-Naphthyridines: Part II - Synthesis of 2-Styryl-1,3-naphthyridines as Antimicrobial Agents
Mogilaiah, K.,Vijayender Reddy, K.,Sreenivasulu, B.
, p. 178 - 179 (2007/10/02)
Friedlander condensation of 2-aminonicotinaldehyde (I) with substituted benzalacetones (II) gives the corresponding 2-styryl-1,8-naphthyridines (III) in the presence of ethanol containing a catalytic amount of 20percent aq.KOH.The antimicrobial activity o
