AlCl3 induced C–N bond formation followed by Pd/C–Cu mediated coupling–cyclization strategy: synthesis of pyrrolo[2,3-b]quinoxalines as anticancer agents
作者:Bagineni Prasad、K. Shiva Kumar、P. Vijaya Babu、K. Anusha、D. Rambabu、Ajit Kandale、G.R. Vanaja、Arunasree M. Kalle、Manojit Pal
DOI:10.1016/j.tetlet.2012.08.119
日期:2012.11
affording a convenient method for the preparation of N-aryl substituted 3-chloroquinoxalin-2-amines. A related N-benzyl derivative, however, was prepared via a conventional method. These N-alkyl/aryl substituted 3-chloroquinoxalin-2-amines on coupling with terminal alkynes in toluene under Pd/C–Cu catalysis afforded a range of 1,2-disubstituted pyrrolo[2,3-b]quinoxalines within 3–5 h in good to excellent