Iridium(III)-Catalyzed Direct Arylation of C–H Bonds with Diaryliodonium Salts
作者:Pan Gao、Wei Guo、Jingjing Xue、Yue Zhao、Yu Yuan、Yuanzhi Xia、Zhuangzhi Shi
DOI:10.1021/jacs.5b06758
日期:2015.9.30
arylation of complex compounds. Mechanistic studies by density functional theory calculations suggested that the sp(3) C-H activation was realized by a triflate-involved concerted metalation-deprotonation process, and the following oxidation of Ir(III) to Ir(V) is the most favorable when a bistriflimide is contained in the diaryliodonium salt. Calculations indicated that both steps are enabled by initial anion
hydroformylation and hydroaminomethylation of α-substituted acrylamides is described using 1,3-phosphite-phosphoramidite ligands based on a sugar backbone. A broad scope of chiral aldehydes and amines were afforded in high yields and excellent enantioselectivities (up to 99%). Furthermore, the synthetic potential of this method is demonstrated by the single-step synthesis of the brain imaging molecule RWAY.
Iridium(<scp>iii</scp>)-catalyzed regioselective direct arylation of sp<sup>2</sup> C–H bonds with diaryliodonium salts
作者:Pan Gao、Li Liu、Zhuangzhi Shi、Yu Yuan
DOI:10.1039/c6ob01145d
日期:——
A regioselectivedirectarylation of arenes and olefins at the ortho position is reported. The key to the high selectivity is the appropriate choice of diaryliodonium salts as the arylating reagent in the presence of a cationic iridium(III) catalyst. The coordination of the metal with an oxygen atom or a nitrogen atom and subsequent C–H activation allows for directarylation with coupling partners
Rhodium(III)-Catalyzed Aerobic Oxidative C–H Olefination of Unsaturated Acrylamides with Unactivated Olefins
作者:Ravichandran Logeswaran、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.0c03981
日期:2021.2.5
unactivated alkenes via vinylic C–H activation has been developed. The present cross-coupling reaction was examined with a variety of differently functionalized acrylamides and unactivated olefins. In these reactions, highly valuable amide-functionalized butadienes were prepared in good to excellent yields. This protocol was also compatible with Weinrebamides. A possible reaction mechanism involving the chelation-assisted
Inverse latex of anionic polyelectrolytes in silicone oils; cosmetic use thereof
申请人:SOCIETE D'EXPLOITATION DE PRODUITS POUR LES
INDUSTRIES CHIMIQUES, S.E.P.P.I.C.
公开号:EP1932515A1
公开(公告)日:2008-06-18
Composition comprising an oil phase, an aqueous phase, at least one emulsifying system of water-in-oil (W/O) type, optionally at least one emulsifying system of oil-in-water (O/W) type, in the form of an inverse latex comprising from 10% to 80% by mass and preferably from 20% to 70% by mass and most preferably from 30% to 60% by mass, of a linear partially or totally salified anionic polyelectrolyte, with wherein in that said oil phase comprises a silicone oil or a mixture of silicone oils; its use to thicken and or to emulsify cosmetic, dermopharmaceutical or pharmaceutical compositions.