Enantioselective reduction of heteroaromatic β,γ-unsaturated ketones was found to be an efficient and convenient alternative to the allylboration of corresponding aldehydes. This new method was used for the formal asymmetric synthesis of SIB-1508Y 2.
[EN] FORMYLTHIOPHENES AND THEIR USE IN FLAVOR AND FRAGRANCE COMPOSITIONS<br/>[FR] FORMYLTHIOPHÈNES ET LEUR UTILISATION DANS DES COMPOSITIONS D'ARÔME ET DE PARFUM
申请人:INT FLAVORS & FRAGRANCES INC
公开号:WO2017079368A1
公开(公告)日:2017-05-11
The present invention is directed to novel organoleptic compounds, a process of augmenting, enhancing or imparting taste to a material selected from the group consisting of a foodstuff, a chewing gum, a dental product, an oral hygiene product and a medicinal product comprising the step of incorporating an olfactory acceptable amount of such novel organoleptic compounds, and a process of improving, enhancing or modifying a fragrance formulation through the addition of an olfactory acceptable amount of such novel organoleptic compounds.
A Ni-catalyzed enantioselective reductive three-component alkylalkenylation of β,γ-alkenyl ketones with cis-alkenyl iodides and fluoroalkyl iodides in the presence of Mn is reported. By leveraging five-membered nickellacycles stabilized by pendant ketone group and chiral bis(oxazoline) (BiOx) ligand, this three-component protocol allows efficient access to enantioenriched β-alkenyl ketones from simple