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The reaction of ethyl 4 H ‐pyran‐4‐one‐2‐carboxylate with 1,2‐diaminobenzene
Author(s) -
Markees Diether G.
Publication year - 1990
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570270659
Subject(s) - quinoxaline , chemistry , pyran , carboxylate , derivative (finance) , ring (chemistry) , medicinal chemistry , stereochemistry , organic chemistry , financial economics , economics
Ethyl 4 H ‐pyran‐4‐one‐2‐carboxylate was allowed to react with 1,2‐diaminobenzene and related diamines. The resulting products were found to be 8 H ‐5,6‐dihydro‐6,8‐dioxopyrido[1,2‐ a ]quinoxaline and derivatives. The synthesis 3 H ‐5,6‐dihydrobenzo[ g ]pyrido[1,2‐ a ]quinoxaline‐3,5‐dione ( 2c ) constitutes the synthesis of a derivative of previously unknown benzo[ g ]pyrido[1,2‐ a ]quinoxaline ring system.