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DOI: 10.1055/s-2002-19809
Unexpected Synthesis of Novel Condensed Heteromacrocycles
Publication History
Publication Date:
03 August 2004 (online)
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Abstract
Alkylation of 4-amino-1,2,4-triazol-3(2H)-thiones 9a-d with 2,3-bis(bromomethyl)quinoxaline (8) in absolute ethanol containing potassium hydroxide gave the corresponding bis(amines) 10a-d. Condensation of the latter with the appropriate aromatic aldehydes in refluxing acetic acid afforded the corresponding benzylideneamino derivatives 12a,b. On the other hand, reaction of the bis(amines) 10a-d with the bis(aldehydes) 13a-c in refluxing acetic acid under high dilution conditions did not lead to the formation of the corresponding macrocyclic Schiffs bases 14. Instead, the reaction gave the corresponding novel condensed heteromacrocycles 15a-f.
Key words
alkylation - bis(bromomethyl)quinoxaline - heteromacrocycles - bis(amines) - bis(aldehydes)
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