Unexpected reduction of ethyl 3-phenylquinoxaline-2- carboxylate 1,4-di-N-oxide derivatives by amines.

The unexpected tendency of amines and functionalized hydrazines to reduce ethyl 3-phenylquinoxaline-2-carboxylate 1,4-di-N-oxide (1) to afford a quinoxaline 1c and mono-oxide quinoxalines 1a and 1b is described. The experimental conditions were standardized to the use of two equivalents of amine...

詳細記述

書誌詳細
主要な著者: Lima, L.M. (Lidia M.), Vicente, E. (Esther), Solano, B. (Beatriz), Pérez-Silanes, S. (Silvia), Aldana, I. (Ignacio), Monge, A. (Antonio)
フォーマット: info:eu-repo/semantics/article
言語:eng
出版事項: MDPI 2012
主題:
オンライン・アクセス:https://hdl.handle.net/10171/23598
その他の書誌記述
要約:The unexpected tendency of amines and functionalized hydrazines to reduce ethyl 3-phenylquinoxaline-2-carboxylate 1,4-di-N-oxide (1) to afford a quinoxaline 1c and mono-oxide quinoxalines 1a and 1b is described. The experimental conditions were standardized to the use of two equivalents of amine in ethanol under reflux for two hours, with the aim of studying the distinct reductive profiles of the amines and the chemoselectivity of the process. With the exception of hydrazine hydrate, which reduced compound 1 to a 3-phenyl-2-quinoxalinecarbohydrazide derivative, the amines only acted as reducing agents.