A. Farag, Y. M. Elkholy, K. A. Ali
2008
Citations
0
Influential Citations
16
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
Several 1,2-diazaspiro[4,4]nona-2,8-diene-6-one derivatives were synthesised via cycloaddition of nitrilimides to 3-aryliden-2(3H)-furanone derivatives. The formed products react with hydrazine hydrate to give the corresponding pyrazolecarbohydrazide derivatives which undergo intramolecure cyclization upon treatment with HCl/AcOH mixture to affored 1,2,7,8-tetrazaspiro[4.5]deca-2,9-diene-6-one derivatives. Molecular mechanics energy minimization techniques and related structural parameters for compound 8-(4-methylphenyl)-1,3,4-triphenyl-7-oxa-1,2-diazaspiro[4.4]nona-2,8-diene-6-one 5a are reported.