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The synthesis of pyrazolo[3,4-d]pyridazines. Photochemical cyclization to pyrazolo[3,4-d]pyridazin-4(5H)-ones with subsequent functionalization

✍ Scribed by Kenji Kaji; Hiromu Nagashima; Yusho Ohta; Keizo Tabashi; Hirohisa Oda

Book ID: 112127587
Publisher: Journal of Heterocyclic Chemistry
Year: 1984
Tongue: English
Weight: 485 KB
Volume: 21
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570210501

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## Abstract Reactions of the pyridazine derivatives **1a–c** with phenyl isothiocyanate followed by heterocyclization with ethyl chloroacetate gave the thiazolidinone derivatives **6a–c**. The reactivity of **6a** towards some chemical reagents was studied. © 2002 Wiley Periodicals, Inc. Heteroatom