Catalytic synthesis and transformations of magnesacycloalkanes

Catalytic cyclometalation reaction of unsaturated compounds in synthesis of magnesa- and aluminacarbocycles

“…Systematic investigation of the ethylmagnesiation and cyclomagnesiation reaction of olefins with nonactivated double bond in the presence of Cp 2 ZrCl 2 catalyst has allowed proposing the mechanistic Scheme of this reaction[205][206][207]. According to the Scheme, primarily, the formation of biscyclopentadienyldiethyl zirconium takes place.…”

Cyclomagnesation of cycloalkynes with the use of RMgR’ catalyzed by zirconium complexes

“…In continuation of the investigation of this reaction, its extension to cyclic acetylenes, and also aiming at the synthesis of new classes of unsaturated fused tricyclic organomagnesium compounds we studied the reactions of cycloalkynes (cyclooctyne, cyclododecyne) with dialkyl and alkylhalogen magnesium derivatives (EtMgBr, BuMgBr, Et 2 Mg, Bu 2 Mg) in the presence of zirconium complexes exhibiting a high activity and selectivity in the cyclomagnesation of α-olefins [2−4], acetylenes [1], terminal 1,2-dienes [5,6], and norbornenes [7].…”