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 65, No. 2, 2005, pp.329-336
Published online, 17th December, 2004
DOI: 10.3987/COM-04-10265
A Synthetic Route To Pyridazino[4,5-b]-1,8-naphthyridines, a New Tetraazaheterocyclic System

Juan Vilar, Carlos Peinador, and José Ma Quintela*

*Department of Fundamental Chemistry, Science Faculty, University of A Coruña, Campus A Zapateira, E-15071, A Coruña, Spain


A synthesis of the substituted pyridazino[4,5-b]-1,8-naphthyridin-6(7H)-ones (6) based on the reaction of ethyl 2-(dibromomethyl)-6-cyano-7-ethoxy-5-phenyl-1,8-naphthyridine-3-carboxylate (3) with hydrazone or substituted hydrazones is described.