New Advances in Chemical Research, May 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry.name: Quinoxalin-6-amine, In a article, mentioned the application of 6298-37-9, Name is Quinoxalin-6-amine, molecular formula is C8H7N3
Photolysis of 6-azidoquinazoline in MeOH-KOMe-dioxan yields 8,9-dihydro-5,7-dimethoxy-5H-pyrimido<5,4-c>azepine (5) which on acid hydrolysis ring-opens to the pyrimidine-carbaldehyde (7).The mechanism of formation of this unexpected dimethoxypyrimido-azepine is discussed and related to previous similar results involving 6-azido-2,3-dihydrofuro- and 6-azido-2,3-dihydrothieno<2,3-b>quinolines. In contrast, 6-azidoquinoxaline and 6-azido-2-chloro-4-methylquinoline on photolysis under similar conditions undergo ring expansion to the expected pyrazino<2,3-c>– and pyrido<3,2-c>azepines (22a) and (17) respectively.However, photolysis of the latter azide in MeOH-dioxan yields the 3-(2-pyridyl)propenonitrile derivative (18) in a reaction analogous to that undergone by 6-azidophenazine.
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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N84 | ChemSpider