NaOH-Mediated Direct Synthesis of Quinoxalines from o-Nitroanilines and Alcohols via a Hydrogen-Transfer Strategy
A NaOH-mediated sustainable synthesis of functionalized quinoxalines is disclosed via redox condensation of o-nitroamines with diols and α-hydroxy ketones. Under optimized conditions, various o-nitroamines and alcohols are well tolerated to generate the desired products in 44-99% yields without transition metals and external redox additives.
Green and efficient synthesis of quinoxaline derivatives via ceric ammonium nitrate promoted and in situ aerobic oxidation of α-hydroxy ketones and α-keto oximes in aqueous media
The direct conversion of α-hydroxy ketones and α-keto oximes into quinoxaline derivatives in the presence of a catalytic amount of ceric ammonium nitrate via metal-catalyzed aerobic oxidation followed by in situ trapping with aromatic 1,2-diamines in water as a green and efficient reaction media, is reported.
Shaabani, Ahmad,Maleki, Ali
p. 79 - 81
(2008/09/17)
Quinoxalino-fused sultines and their application in Diels-Alder reactions
The synthesis of 7,8-disubstituted quinoxalino[2,3-d]-[1,2λ4]oxathiine 2-oxides 7a-c, precursors for quinoxalino-o-quinodimethanes 3a-c, and their application in the Diels-Alder reactions are reported.
Chung, Wen-Sheng,Liu, Jing-Horng
p. 205 - 206
(2007/10/03)
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