Cp<sub>2</sub>ZrMeCl: A Reagent for Asymmetric Methyl Addition
作者:Kilian Garrec、Stephen P. Fletcher
DOI:10.1021/acs.orglett.6b01829
日期:2016.8.5
The use of Cp2ZrMeCl is described as a source of nucleophilicmethyl in asymmetric catalysis. This easily prepared reagent is bench stable, weighable in air, and generally useful in highly enantioselective copper-catalyzed addition reactions at room temperature. Methyl is successfully (generally >90% ee) added in 1,4-additions to cyclic and acyclic α,β-unsaturated ketones to provide tertiary and quaternary
Process for the preparation of novel unsaturated macrocyclic ketones
申请人:Firmenich SA
公开号:US04302607A1
公开(公告)日:1981-11-24
New unsaturated macrocyclic ketones are obtained via a process which consists in reacting a dialdehyde with a tetraalkyldiphosphonate ester. The new ketones are useful intermediates for the preparation of cyclopentadecanone and its higher methyl-homologue, known fragrant substances. New ketones possess also direct utility as musky odorants.