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Formation of pyridazino[4,5‐ c ]pyridazine derivatives upon [4+2]cycloaddition of 4‐phenyl‐1,2,4‐triazoline‐3,5‐dione to cross‐conjugated monoferrocenyltrienes
Author(s) -
Martínezmendoza Juan M.,
Vázquez López Eduardo A.,
Esparza Rafael Moreno,
Alamo Marcos Flores,
Klimova Elena I.
Publication year - 2006
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570430446
Subject(s) - pyridazine , chemistry , cycloaddition , conjugated system , stereochemistry , medicinal chemistry , organic chemistry , polymer , catalysis
Cross‐conjugated monoferrocenyltrienes react with 4‐phenyl‐1,2,4‐triazoline‐3,5‐dione to give mono‐ and bis‐[4+2]‐cycloaddition products. Nonsubstituted and 2,4‐disubstituted 3‐ferrocenylmethylidenepenta‐1,4‐dienes afford respective pyridazine and pyridazino[4,5‐ c ]pyridazine derivatives. Their structures were established based on 1 H and 13 C NMR data and X‐ray diffraction analysis.