O. S. Vostrikova

Carbalumination of higher ?-olefins catalyzed by titanium and zirconium complexes

ConclusionsA regioselective method was developed for the carbometallation of higherα-olefins using Et3Al and Et2AlCl in the presence of titanium and zirconium complexes which permits the preparation of higher trialkylaluminums and dialkylaluminum halides in high yield under mild conditions in one step.

Regioselective hydroalumination of unsaturated hydrocarbons by alkylalanes catalyzed by zirconium complexes

ConclusionAn effective method has been developed for the preparation of difficultly accessible higher dialkylhaloalanes by hydroalumination of mono-, di-, and tri-olefins of different structures by i-Bu2AlCl in the presence of Cp2ZrCl2.

New method of β-alkylation of α-olefins using dialkylaluminum chlorides with catalytic amounts of Ti, Zr, and Hf complexes

Conclusions1.The possibility of β-alkylation of α-olefins by higher dialkylaluminum chlorides in the presence of Zr(OBu)4 was shown.2.A single step catalytic method was proposed for the synthesis of higher dialkylaluminum chlorides from Et2AlCl and α-olefins.3.The catalytic activity of various Ti, Zr, and Hf compounds was studied in the alkylation reaction of α-olefins by diethylaluminum chlorides.

Hydroalumination of cycloolefins by diisobutylaluminum hydride catalyzed by zirconium compounds

ConclusionsZirconium chloroalkoxides are effective catalysts for the hydroalumination of cycloolefins by diisobutylaluminum hydride.

New method for inserting ethyl group in β-position of higher α-olefins using diethylaluminum chloride

ConclusionsZr(OBu-n)4 and ZrCl4 catalyze the β-alkylation of α-olefins with diethylaluminum chloride under mild conditions. A probable scheme was proposed for the process.

Production of regular, linear isoprene oligomers in the presence of nickel-containing homogeneous catalysts

Conclusions1.The oligomerization of isoprene was studied in the presence of nickel complexes activated by o- and m-borates.2.The borates, in contrast to phosphorus-containing activators, direct the reaction primarily towards the formation of linear trimers and tetramers of isoprene, namely, 3-methylene-7,11-dimethyl-1-trans-6,11-dodecatriene, 2,6,10-trimethyl-1-trans-3,5,10-dodecatriene, and 2,6,10,14-tetramethyl-1-trans-3,6,10,14-hexadecapentane.

Codimerization of C6-C10 α-olefins with butadiene using zirconium complexes

ConclusionsThe codimerization of butadiene with linear C6-C10α-olefins on a ZrCl4-AlEt2Cl catalyst leads to the 1,4-addition products of theα-olefin to butadiene.

Dimerization and codimerization of higher α-olefins, catalyzed by zirconium complexes

Conclusions1.The system Zr(OBu)4-AEt2Cl catalyzes the selective dimerization of the higher α-olefins to the corresponding methylenealkanes.2.The yield of the dimers decreases with increase in the number of carbon atoms in the α-olefin, accompanied by a simultaneous decrease in the degree of migration of the double bonds in them.

Linear cooligomerization of butadiene with acrylates having various structures in the presence of nickel complexes

1. Aliphatic linear and cyclic radicals affect the selectivity of the cooligomerization of butadiene with acrylic and methacrylic esters in the presence of nickel complexes and in a number of cases make it possible to obtain previously unknown codimers. 2. The cooligomerization of phenyl methacrylate with butadiene leads to the production of the previously unknown phenyl 2-methylene-6-heptenoate with a high yield. Under analogous conditions phenylα-fluoro-acrylate and phenyl acrylate with butadiene give diene synthesis products exclusively.

Synthesis and transformations of 2, 5, 10-undecatrienoic acid

1. The conditions were found for obtaining methyl trans-2,5,10-undecatrienoate and the methyl esters of the 4-vinyl-2,7- and 7,10-dodecadienecarboxylic acids in high yields by the cooligomerization of butadiene with methyl acrylate on nickel-containing catalysts. 2. The transformations of methyl trans-2,5,10-undecatrienoate were studied.