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ChemInform Abstract: C-Nucleophilic Substitution of 5-Halo-1,2,3-thiadiazoles as an Approach to Fused Pyridones and Pyranones.

✍ Scribed by E. V. TARASOV; YU. YU. MORZHERIN; S. TOPPET; W. DEHAEN; V. A. BAKULEV

Publisher: John Wiley and Sons
Year: 2010
Weight: 35 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199809149

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✦ Synopsis

C-Nucleophilic Substitution of 5-Halo-1,2,3-thiadiazoles as an Approach to Fused Pyridones and Pyranones. -A new approach to the synthesis of fused 1,2,3-thiadiazoles [cf. (III), (V), (VIII), (X)] based on the nucleophilic substitution of halogen in 5-chlorothiadiazoles by C-nucleophilic reagents (malonic acid derivatives) and subsequent intramolecular cyclization is developed. In some cases, it is possible to isolate the open-chain products of nucleophilic substitution [cf. (VII)].

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