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Synthesis 2005(5): 781-786
DOI: 10.1055/s-2005-861827
DOI: 10.1055/s-2005-861827
PAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of Alkoxy-Substituted Pyridines from Mono- and Tricationic Pyridinium Salts
Further Information
Received
20 October 2004
Publication Date:
14 February 2005 (online)
Publication History
Publication Date:
14 February 2005 (online)
Abstract
Nucleophilic substitution reactions on 4-(4-dimethylamino)-pyridinium-substituted tetrachloropyridine with oxygen nucleophiles such as alkoxides and phenolates resulted in the formation of 4- or 2,4-alkoxy- or -phenoxy-substituted chloropyridines depending on the reaction conditions. Substitution on 2,4,6-tris(4-dimethylamino)pyridinium-substituted 3,5-dichloropyridine gave the corresponding 2,4,6-tris-alkoxy- or -phenoxy-substituted pyridines which are not available by other routes.
Key words
nucleophilic aromatic substitutions - pyridinium salts - pyridines - trication
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