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Properties of a multiple bond conjugated with the pyridine ring (1973)

Terent'ev, P. B. ; Vinogradova, S. M. ; Kost, A. N. ; [et al.]

Springer

Chemistry of heterocyclic compounds 9 (1973), S. 55-59

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ISSN: 1573-8353

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract The products of the addition of diazomethane to the double bond of α-, β-, and γ-vinyl-pyridines, 2-propenyl-, 2-styryl-, and 2-(p-nitrostyryl)pyridines, and β-(2-pyridyl)acrylic acid were obtained. When a hydrogen atom or alkyl or phenyl group is present in the β-position of the vinyl group, 3-pyridyl-Δ2-pyrazolines are formed (they are isolated as the acetyl derivatives). Electron-acceptor substituents (COOCH3 and C6H4NO2) in this position disrupt the polarization, and this leads to the formation of a mixture of two isomeric pyrazolines. The primary formation of Δ1-pyrazolines was proved by means of IR and UV spectroscopy.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00476150

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