L. D. Sychkova

Mercuration of phenyl cyclopropanes: spatial factors

Mercuration of trans-1-phenyl-2-cyclohexylcyclopropane and stereoisomeric 1,2-di- and 1,2,3-triphenylcyclopropanes has been studied. An increase in the number of substituents in the cyclopropane ring leads to an increase in the stability of the ring towards mercury acetate, and substitution in the aromatic ring is the main process with 1,2,3-triphenylcyclopropane.

3-Hydroxyphenyl derivatives of pyrazolines and tetrahydropyridazines in a catalytic decomposition reaction

The isomeric 3-(hydroxyphenyl)-1,4,5,6-tetrahydropyridazines differ from their five-membered-ring analogs, the 3-(hydroxyphenyl)-Δ2-pyrazolines, in their behavior in catalytic-decomposition reactions. The catalytic conversion of 3- (hydroxyphenyl)-1,4,5,6-tetrahydropyridazines takes place at 120–200° C, dehydrogenation being the main reaction. The hydroxyphenylpyrazolines, under the same conditions, undergo decomposition with liberation of nitrogen and formation of the corresponding cyclopropanes.