Herein, we describe an intermolecular direct branched‐selective α‐alkylation of cyclicketones with simple alkenes as the alkylation agents. Through an enamine‐transition metal cooperative catalysis mode, the α‐alkylation is realized in an atom‐ and step‐economic manner with excellent branched selectivity for preparing β‐branched ketones. Employment of a pair of bulky Brønsted acid and base as additives
Branched-Selective Intermolecular Ketone α-Alkylation with Unactivated Alkenes via an Enamide Directing Strategy
作者:Dong Xing、Guangbin Dong
DOI:10.1021/jacs.7b08581
日期:2017.10.4
We describe a strategy for intermolecular branched-selective α-alkylation of ketones using simple alkenes as the alkylating agents. Enamides derived from isoindolin-1-one provide an excellent directing template for catalytic activation of ketone α-positions. High branched selectivity is obtained for both aliphatic and aromatic alkenesusing a cationic iridium catalyst. Preliminary mechanistic study
[EN] SPRAY COMPOSITIONS<br/>[FR] COMPOSITIONS DE SPRAYS
申请人:THE PROCTER & GAMBLE COMPANY
公开号:WO1998035651A1
公开(公告)日:1998-08-20
(EN) The present invention relates to personal care and pharmaceutical compositions comprising an alcohol, a personal care polymer, and an alcohol-masking perfumery component. These compositions can be applied to the skin, hair, or mucosa. The alcohol-masking perfumery component substantially reduces both the alcohol odor or aroma and the stinging or burning sensation in the nose or throat due to the alcohol when the compositions are sprayed or atomized.(FR) La présente invention concerne des compositions pour produits d'hygiène corporelle et produits pharmaceutiques. Ces compositions comprennent un alcool, un polymère d'hygiène corporelle, et un composant de parfumerie masquant l'alcool. Ces compositions peuvent s'appliquer sur la peau, les cheveux ou les muqueuses. Le composant de parfumerie masquant l'alcool réduit sensiblement non seulement l'odeur et l'arôme de l'alcool, mais également la sensation de piqûre et de brûlure portant dans le nez ou à la gorge que produit l'alcool lorsque les compositions sont pulvérisées ou atomisées.