New fused tetrazolone derivatives were synthesized using homophthalic and maleic anhydrides. Treatment of anhydrides with trimethylsilyl azide opened the lactone rings and formed the corresponding intermediates, which bore 1,3-dipole and dipolarophile functionalities in ortho positions. The intermediates partially underwent internal 1,3-dipolar cycloaddition to produce fused tetrazolone derivatives. When the carbonyl groups in anhydride were not conjugated with any double bond, then a triazine-fused tetrazolone derivative was formed.
ÖZCAN, SEVİL; EKMEKÇİ, ZEYNEP; MÜJDE, BERK; and BALCI, METİN
"Synthesis of fused tetrazolone derivatives,"
Turkish Journal of Chemistry: Vol. 37:
4, Article 10.
Available at: https://journals.tubitak.gov.tr/chem/vol37/iss4/10