✦ LIBER ✦

The Synthesis and Reactions of 1-(2-Propynyl)pyidinium Salts

✍ Scribed by Alan R. Katritzky; Otto A. Schwarz; Olga Rubio; Diether G. Markees

Publisher: John Wiley and Sons
Year: 1984
Tongue: German
Weight: 434 KB
Volume: 67
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19840670404

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✦ Synopsis

Abstract

The synthesis of 1‐(2‐propynyl)pyridinium salts 3 described. Compounds 3 react with a second pyridine molecule, in the presence of the corresponding hydrochloride, to form products of type 4, Certain bases cause the 1‐(2‐propynyl)pyridinium salts 3 to rearrange into 1‐propadienylpyridinium salts. 5. Diethylamine converts compounds 3 into 1‐acetonylpyridinium salts 8. Moreover, treatment of 3 or 5 with sodium methoxide gives enol ether sof type 9, which can be hydrolyzed to teh ketones 8. Addition of bromine to some of teh unsaturated compounds is also reported.

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