
Heterocycles p. 265 - 270 (2000)
Update date:2022-08-16
Topics:
Sakai, Norio
Funabashi, Makoto
Minakata, Satoshi
Ryu, Ilhyong
Komatsu, Mitsuo
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.
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