Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact:

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 32, No. 5, 1991, pp.895-900
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5622
Pyridazine Derivatives and Related Compounds Part 5. Pyrazolo[3,4-c]pyridazine: Synthesis and Some Reactions

Ali Deeb,* Besher Bayoumy, Abd El-Naby Essawy, and Rida Fikry

*Department of Chemistry, Faculty of Science, University of Zagazig, Zagazig, Egypt


This paper describes the synthesis of three pyrimido[1’,2’: 1,5]pyrazolo[3,4-c]pyridazines (6, 7 and 9) starting from 3-amino[3,4-c]pyridazine (1). Pyrimido[5’,4’:5,6]pyrimido[1’,2’:1,5]pyrazolo[3,4-c]pyridazine derivatives (8) was obtained by condensing 7a with formamide. Reactions of 1 with acetic anhydride, benzoyl chloride, phenacyl bromide and 4-chlorophenacyl bromide gave 3-substituted amino derivatives.