26482-55-3Relevant articles and documents
Preparation of novel 2,3,8-trisubstituted pyrido[3,4-b]pyrazines and pyrido[2,3-b]pyrazines
Antoine, Maud,Czech, Michael,Gerlach, Matthias,Guenther, Eckhard,Schuster, Tilmann,Marchand, Pascal
experimental part, p. 794 - 806 (2011/04/16)
A four-step synthesis of 8-bromo-2,3-disubstituted pyrido[3,4-b]pyrazines and a six-step synthesis of 8-amino-2,3-disubstituted pyrido[3,4-b]pyrazines have been developed. A particularly valuable feature of this synthetic route is the possibility to build
Substituent Effects on the Isomer Ratios in the Rearrangement of Some 2- and 4-Nitraminopyridines
Deady, Leslie W.,Korytsky, Olga L.,Rowe, Jeffrey E.
, p. 2025 - 2034 (2007/10/02)
The preparation, and rearrangement in 92percent sulfuric acid, of 4-X-2-nitramino- (1), 2-X-4-nitramino- (2), and 6-X-2-nitramino-pyridines (3) is reported (X=H,Me,MeO,Br,Cl,CO2H).The product isomer ratios can be explained by differential electronic stabilization of the appropriate ? complexes for aromatic nitration and steric effects seem relatively unimportant.Deuteration had no effect on the product distribution