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Studies of the Elimination of 4-Aryl-3-Methyl-4-piperidinols-II:π ⪰ π Transitions in some 4-aryl-1,2,5,6-tetrahydropyridines

Authors
Journal
Tetrahedron
0040-4020
Publisher
Elsevier
Publication Date
Volume
22
Issue
8
Identifiers
DOI: 10.1016/s0040-4020(01)99066-0

Abstract

Abstract The electronic absorption characteristics of some 4-phenyl-, p-tolyl-, p-methoxyphenyl- and p-dimethylaminophenyl-1,2,5,6-tetrahydropyridines are shown to differ from those of corresponding hydrochloride and quaternary salts. These differences are interpreted in terms of the influence of electronic factors upon the π ⪰ π * transitions of the styrenoid chromophore present in these bases. In the case of the p-dimethylaminophenyl derivatives, this interpretation is supported by p K a′ data.

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