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: ¥ 4,320 (Yen only)
Period: This Article can be accessed for 7 days.

Communication | Regular issue | Vol 53, No. 2, 2000, pp.265-270
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8760
Synthesis of New Mesomeric Betaines Containing a Triazolopyridiniumolate System and Their Unexpected Function as Masked Isocyanates

Norio Sakai, Makoto Funabashi, Satoshi Minakata, Ilhyong Ryu, and Mitsuo Komatsu*

*Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

Abstract

A series of mesomeric betaines containing 1-alkylated triazolopyridiniumolate system were synthesized and their cycloaddition with dimethyl acetylenedicarboxylate were examined. An unusual ring-opening reaction occurred to give pyridone derivatives indicating that these betaines act as masked isocyanates.