1.
Org Biomol Chem
; 14(37): 8721-8727, 2016 Sep 21.
Artigo
em Inglês
| MEDLINE
| ID: mdl-27714201
RESUMO
An efficient one-pot transition metal-free procedure for the synthesis of new pyrazolo[1,5-a]quinoxalin-4(5H)-ones from easily prepared 1-(2-chlorophenyl-5-ethylcarboxylate)pyrazoles and various primary alkylamines is described. The key steps involved in the synthesis of the new 5,6-fused ring system are the formation of an amide intermediate followed by an intramolecular N-arylation reaction via nucleophilic aromatic substitution.