Preparation and Synthetic Utility of 2-Methylselenomethyl Allyl Methyl Selenide. A Valuable Precursor to 2-Silylmethylallyllithiums
作者:Alain Krief
DOI:10.1055/s-1998-1915
日期:1998.11
3-Lithio-2-[silylmethyl]propenes, easily prepared from 3-methylseleno-2-[silylmethyl]propenes by the cleavage of the C-Se bond, are useful intermediates for the preparation of a variety of functionalised allylsilanes. These allylsilanes are interesting building blocks, used for example, as annelating agents in the efficient synthesis of spiroketals by the Intramolecular Silyl-Modified Sakurai (ISMS)
A Convenient and Versatile Preparation of Unsymmetrical Bis-metallic Isobutene Derivatives
作者:Bernard Leroy、Benoît Driesschaert
DOI:10.1055/s-2006-948188
日期:2006.8
Synthetically useful unsymmetrical bis-silyl or silylstannyl isobutene derivatives are conveniently prepared from selenoisobutene 5, a versatile equivalent of the isobutene dianion. Sequential treatment of this selenated compound with n-butyl-lithium and the required chlorosilanes or chlorostannanes leads efficiently to the corresponding functionalized isobutenes.