Difunctional heterocycles: a convenient synthesis of bis(pyridinyl-2,3-dihydrooxadiazolyl)benzenes

Authors
Elwahy, AHM Ahmed, MM El-sadek, M
Citation
Ahm. Elwahy et al., Difunctional heterocycles: a convenient synthesis of bis(pyridinyl-2,3-dihydrooxadiazolyl)benzenes, J CHEM R-S, (5), 2001, pp. 175-178
Citations number
14
Categorie Soggetti
Chemistry
Journal title
JOURNAL OF CHEMICAL RESEARCH-S
ISSN journal
03082342 → ACNP
Issue
5
Year of publication
2001
Pages
175 - 178
Database
ISI
SICI code
0308-2342(200105):5<175:DHACSO>2.0.ZU;2-6
Abstract
Bis(pyridinyl-2,3-dihydrooxadiazolyl)benzenes 5a-e and 9a, b are obtained i n 25-85% yields by heating the corresponding bis(hydrazones) 4a-f and 8a, d in refluxing AC(2)O-AcOH for 3-5 h, while the bishydrazones 19 and 17b giv e 33-54% yields of the phthalazine derivatives 20a, b upon heating in reflu xing ethanol containing acetic acid.