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
Permalink