Reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates
1989 ◽
Vol 54
(7)
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pp. 1880-1887
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The reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates Ia-Ic produces mixtures of 1,4-dihydropyridines IIa-IIe and 1,2-dihydropyridines IIIa-IIIe. Analogous reactions of phenylmagnesium bromide with compounds Ia-Ic proceed with very low conversions (less than 1%). Photochromism in visible range is observed only with the compounds II which have two aromatic substituents at 4-position, whereas compounds III and IId show no visible photochromism. The molecular spectra of the compounds newly prepared are discussed.
1991 ◽
Vol 49
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pp. 850-851
2018 ◽
Vol 1
(3)
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pp. 282-296
2020 ◽
2017 ◽
2019 ◽
2003 ◽
Vol 7
(9)
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pp. 867-926
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Keyword(s):
2004 ◽
Vol 1
(2)
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pp. 209-217
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