Catalytic synthesis and reactions of magnesiocycloalkanes. 2. Synthesis of substituted magnesiocyclopentanes in the presence of zirconium complexes
作者:U. M. Dzhemilev、R. M. Sultanov、R. G. Gaimaldinov、R. R. Muslukhov、S. I. Lomakina、G. A. Tolstikov
DOI:10.1007/bf01150907
日期:1992.4
Catalytic cyclometallation of styrene, m-methylstyrene, p-tert-butylstyrene, and 1-hexene with di-n-alkylmagnesium compounds (n-R2Mg, where R = C3H7, C4H9, and C6H13) in the presence of Cp2Zr2Cl2 has given high yields of 2,4-disubstituted magnesiocyclopentanes. The probable mode of formation of magnesiocyclopentanes, involving zirconocyclopentanes formed from Cp2ZrCl2, n-R2Mg, and the appropriate olefins as reactive intermediates in the cyclometallation, is discussed.