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Synthesis of Methylene- and Methine-Bridged Oligopyridines.

✍ Scribed by Gerald Dyker; Oliver Muth

Publisher
John Wiley and Sons
Year
2005
Weight
22 KB
Volume
36
Category
Article
ISSN
0931-7597

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Synthesis of Methylene- and Methine-Brid
Synthesis of Methylene- and Methine-Bridged Oligopyridines
✍ Gerald Dyker; Oliver Muth πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 101 KB

## Abstract A variety of methylene‐ and methine‐bridged oligopyridines are conveniently accessible through stepwise nucleophilic aromatic substitution with fluoro‐substituted pyridines. The yields achieved are regularly above 90%. (Β© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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An annelation reaction is presented in which 1,3-cyclohexanedione (1) and Mannich bases 6a,b are used for the preparation of functionalized bipyridines 12a, 13a, 14a and dihydropyridine derivatives 10b, 11b. All these products possess a keto group which will allow further transformations. The same c