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Polycyclic pyridazines. II [3]. Synthesis of pyrazolo[4′,3′:5,6]pyrido[2,3‐ d ]pyrid‐azine derivatives from dimethyl pyrazolo[3,4‐ d ]pyrid‐azine‐5,6‐dicarboxylates as the key intermediates
Author(s) -
Tominaga Yoshinori,
Luo JiannKuan,
Castle Lyle W.,
Castle Raymond N.
Publication year - 1993
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.5570300145
Subject(s) - chemistry , azine , pyridazine , ring (chemistry) , medicinal chemistry , alkoxy group , stereochemistry , organic chemistry , alkyl
The synthesis of the novel pyrazolo[4′,3′:5,6]pyrido[2,3‐ d ]pyridazine ring system and some of its derivatives has been accomplished such as 4‐amino‐1‐phenyl‐5,8‐dioxo‐, 4‐amino‐5,8‐dioxo‐, 1‐phenyl‐5,8‐dioxo‐, 5,8‐dioxo‐, 5,8‐dichloro‐1‐phenyl‐, 5‐ethoxy‐1‐phenyl‐ and 8‐ethoxy‐1‐phenylpyrazolo[4′,3′:5,6]pyrido[2,3‐ d ]pyrid‐azines.