Preparation of Axially Chiral (Racemic) spirosilanes and Spirogermanes by Selective Spirozirconation

摘要

Chiral (racemic) functional spirosilanes or-germanes, containing two (or four) stereogenic centers, were synthesized by selective cyclozirconation (or spirozirconation) of di- and tetraallylsilanes and di- and tetraallylgermanes.