Cyclomagnesation of cycloalkynes with the use of RMgR’ catalyzed by zirconium complexes
摘要:
The intermolecular cyclomagnesation of cycloalkynes and joint cyclomagnesation of cycloalkynes and disubstituted acetylenes was carried out by treating with RMgR' (R, R' = Et, Bu, H1g) in the presence of Cp2ZrCl2 as a catalyst. As a result new unsaturated bi-and tricyclic organomagnesium compounds were obtained in high yields.
Kinetics of Zr-Catalyzed Cycloalumination of Alkenes and Alkynes in the Dzhemilev Reaction
作者:I. R. Ramazanov、R. N. Kadikova
DOI:10.1134/s0023158420010085
日期:2020.1
AbstractThe kinetics and chemoselectivity of cycloalumination of 1-octene and 4-octyne with Et3Al in the presence of a catalytic amount of Cp2ZrCl2 in hexane at various temperatures and ratios between reactants was studied. It was found that chemoselectivity for the formation of aluminacyclopentanes and aluminacyclopentenes was improved and the reaction time was significantly shortened when the cycloalumination