152532-13-3Relevant articles and documents
Efficient regioselective heterocyclisation leading to fluorescent fused pyrazine derivatives
Ostrowska, Katarzyna,Szymoniak, Katarzyna,Szczurek, Magdalena,Jamrozy, Krzysztof,Ra?pa?a-Kozik, Maria
experimental part, p. 5219 - 5227 (2011/07/31)
The regioselective syntheses of substituted pyrrolo[2,3-b]quinoxaline, pyrido[2,3-b]pyrrolo[2,3-e]pyrazine, pyrido[2,3-b]pyrrolo[3,2-e]pyrazine and pyrido[3,4-b]pyrrolo[3,2-e]pyrazine are reported. Differential reactivity between two amino groups in ortho-diaminopyridine can be exploited to obtain new regio-defined unsymmetrical pyridopyrrolopyrazine derivatives. Weak electron-donating methyl or moderately electron-withdrawing carboxylic groups attached to the aromatic ortho-diamines reduce the regioselectivity of obtaining unsymmetrical substituted pyrrolo[2,3-b]quinoxaline. The fluorescence properties of the resultant 1-alkyl pyridopyrrolopyrazine and substituted pyrrolo[2,3-b]quinoxaline derivatives are presented.
SYNTHESIS OF 2(1H)-QUINOLINONEQUINONES AND 2-ALKOXYQUINOLINEQUINONES USING OXIDATIVE DEMETHYLATION WITH CERIUM (IV) AMMONIUM NITRATE
Kitahara, Yoshiyasu,Nakahara, Shinsuke,Shimizu, Masaro,Yonezawa, Takanobu,Kubo, Akinori
, p. 1909 - 1924 (2007/10/02)
2,5,8(1H)-Quinolinetriones (12), 2,5,6(1H)-quinolinetriones (13), 2-alkoxy-5,8-quinolinediones (14), 2,8-dimethoxy-5,6-quinolinedione (15), and 2,6-dimethoxy-7,8-quinolinediones (16) were synthesized by oxidative demethylation of the corresponding 2(1H)-q