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ChemInform Abstract: A Novel One-Pot Isocyanide-Based Four-Component Reaction: Synthesis of Highly Functionalized 1H-Pyrazolo[1,2-b]phthalazine-1,2-dicarboxylates and 1H-Pyrazolo[1,2-a]pyridazine-1,2-dicarboxylates.

✍ Scribed by Keshipour, Sajjad; Shojaei, Salman; Shaabani, Ahmad

Book ID: 118755526
Publisher: John Wiley and Sons
Year: 2012
Weight: 43 KB
Volume: 43
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.201248167

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## Abstract The reactive 1 : 1 zwitterionic intermediate formed by the addition of isocyanides to dialkyl acetylenedicarboxylates was trapped with 4‐arylurazoles to produce the highly functionalized pyrazolo[1,2‐__a__][1,2,4]triazoles **5** in good yields (__Table__). The structures of the products

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