Synthesis 2002(2): 0260-0264
DOI: 10.1055/s-2002-19809
PAPER
© Georg Thieme Verlag Stuttgart · New York

Unexpected Synthesis of Novel Condensed Heteromacrocycles

Ahmed H. M. Elwahy*, Ashraf A. Abbas, Refaie M. Kassab
Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
Fax: +20(2)5727556; e-Mail: aelwahy@chem-sci.cairo.eun.eg;
Further Information

Publication History

Received 20 July 2001
Publication Date:
03 August 2004 (online)

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.