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Synthesis of condensed quinoxalines. Part II
Author(s) -
Sabnis R. W.,
Rangnekar D. W.
Publication year - 1992
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.5570290110
Subject(s) - chemistry , quinoxaline , conjugated system , enol , organic chemistry , amine gas treating , medicinal chemistry , combinatorial chemistry , polymer , catalysis
Abstract A novel efficient synthesis of fluorescent, fused quinoxalines was achieved. 7‐Triazolyl‐1,4‐dioxino[2,3‐ b ]‐quinoxalines were synthesized by the diazotisation of 7‐amino‐1,4‐dioxino[2,3‐ b ]quinoxaline and coupling with selected aromatic amines followed by air oxidation. Diazotised aryl amines were coupled with 7‐amino‐1,4‐dioxino[2,3‐ b ]quinoxalines followed by subsequent air oxidation afforded 1,4‐dioxino[2,3‐ b ]quinoxalino‐[6,5‐ d ]1,2,3‐triazoles. 7‐Amino‐1,4‐dioxino[2,3‐ b ]quinoxaline was condensed with conjugated enol ethers followed by cyclization in dowtherm resulted in 1,4‐dioxino[2,3‐ b ]quinoxalino[6,5‐ b ]pyridines.