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: purchase@heterocycles.com

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

Paper | Regular issue | Vol 29, No. 11, 1989, pp.2149-2156
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5143
Cyclization Reactions of Arylhydrazone Adducts — Synthesis of 1-Aryl-1H-1,2,4-triazolo[4,3-b]indazoles

Giuseppe Cusmano, Gabriella Macaluso, Michelangelo Grueeadauria, and Silvestre Buscemi

*Dipartimento Chimica Organica, Università digli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy

Abstract

The 1,3-addition reaction of nitrilimines to 3-indazolinone 11 and the acid assisted 6 π heteroelectrocyclic reaction of hydrazone adducts 13 have been investigated. Synthesis of the 1,3-substituted 1H-1,2,4-triazolo[4,3-b]-indazole system 17 via cyclization of 13 is described.