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Azulene-Substituted Pyridines and Pyridinium Salts. Synthesis and Structure. Part 2. Azulene-Substituted Pyridinium Salts.

โœ Scribed by Alexandru C. Razus; Liviu Birzan; Claudia Pavel; Oana Lehadus; Andreea Corbu; Filip Chiraleu; Cristian Enache

Publisher
John Wiley and Sons
Year
2007
Weight
34 KB
Volume
38
Category
Article
ISSN
0931-7597

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โœฆ Synopsis

Abstract

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Azulene-substituted pyridines and pyridi
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in ethanol 1) +AzH in CH 3 NO 2 2) AcONH 4 (a) (b) 4-Azulen-1-yl substituted 2,6-dimethyl-and 2,6-diphenyl-pyridines are obtained in good yields from the reaction of corresponding 4-azulen-1-yl-pyranylium salts and ammonium acetate in ethanol or starting from 4-chloro-2,6-diphenyl-pyranylium salts

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Pyrylium Salts of ฮณ-Thiapyrones -A Simple Step to Phosphonophosphino Substituted Pyridines and Pyridinium Salts. -The recently reported pyrones (I) are easily converted to pyrylium salts (III). These [cf. (IIIa)] are converted to pyridines or pyridinium salts with ammonia or primary amines.