Reductive dehydroxy coupling of 2-(hydroxymethyl)indenes to prepare ethano-bridged bis(2-indenyl) ansa-titanocenes
作者:Hasan Palandoken、Justin K Wyatt、Shawn R Hitchcock、Marilyn M Olmstead、Michael H Nantz
DOI:10.1016/s0022-328x(99)00024-8
日期:1999.5
examples of ansa-titanocenes derived from 1,2-bis(2-indenyl)ethane have been prepared. The titanium-mediated reductive coupling of 2-(hydroxymethyl)indenes provided a convenient method for substrate dimerization. Alkyl substitution of the indene ring at C(3) improved the regioselectivity of the reductive coupling to provide the ethylene bis(2-indenyl)ansa-ligands in 29–62% yield.