Expanded Scope of the Asymmetric Hydrogenation of Minimally Functionalized Olefins Catalyzed by Iridium Complexes with Phosphite-Thiazoline Ligands
作者:Javier Mazuela、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/cctc.201300189
日期:2013.8
We have replaced the oxazoline group with a thiazoline moiety in one of the most successful of the phosphite–oxazoline ligand families for the Ir‐catalyzedhydrogenation of minimallyfunctionalizedolefins. A small but structurally important library of Ir phosphite–thiazoline precatalysts (Ir‐L1–L2 a–e) has been developed by changing the substituents/configurations at the biaryl phosphite group. We
我们已经用噻唑啉部分取代了恶唑啉基团,这是亚磷酸酯-恶唑啉配体家族中最成功的一种,用于最小功能化烯烃的Ir催化加氢。通过改变亚磷酸联芳酯基团的取代基/构型,开发了一个小的但在结构上很重要的亚磷酸Ir-噻唑啉预催化剂库(Ir- L1 - L2 a - e)。我们发现在配体设计中用噻唑啉部分取代恶唑啉在底物范围方面是有益的。
Trifluoromethylation of Allylsilanes under Copper Catalysis
作者:Satoshi Mizuta、Oscar Galicia-López、Keary M. Engle、Stefan Verhoog、Katherine Wheelhouse、Gerasimos Rassias、Véronique Gouverneur
DOI:10.1002/chem.201201707
日期:2012.7.9
Branched allylic CF3 products are accessible by copper‐catalyzed trifluoromethylation of allylsilanes with the Togni reagent I. The silyl group is critical to control the outcome of this reaction because in its absence, a product of addition between the alkene and the Togni reagent is formed preferentially. The reaction is inhibited with 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) and is likely to
Trifluoromethylation of aromatic alkenes by visible-light-driven photoredox catalysis: Direct conversion of alkenes to 3-trifluoromethyl-1-propenyl and 1,3-bis(trifluoromethyl)-1-propenyl derivatives
irradiation has been developed. A Ru photocatalyst, [Ru(bpy)3](PF6)2 (bpy = 2,2′-bipyridine), is useful for the present trifluoromethylation and preferable formation of 3-trifluoromethyl-1-propenyl derivatives is observed. Use of an excess amount of Umemoto's reagent readily induces double trifluoromethylation of electron-rich alkenes, resulting in 1,3-bis(trifluoromethyl)-1-propenyl skeleton.
[EN] SALTS OF INDAZOLE DERIVATIVE AND CRYSTALS THEREOF<br/>[FR] SELS DE DÉRIVÉ D'INDAZOLE ET LEURS CRISTAUX
申请人:EISAI R&D MAN CO LTD
公开号:WO2018097273A1
公开(公告)日:2018-05-31
The present invention provides salts of (E)-N,N-dimethyl-4-((2-((5-((Z)-4,4,4-trifluoro-1-(3-fluoro-1H-indazol-5-yl)-2-phenylbut-1-en-1-yl)pyridin-2-yl)oxy)ethyl)amino)but-2-enamide represented by the formula I and acids, and crystals thereof, possessing a potential to be used as drug substance in pharmaceuticals.
We report herein a novel photoredox‐catalyzed synthesis of allylic trifluoromethanes. The use of sulfilimino iminium as a source of trifluoromethyl radicals proves crucial to achieving high selectivity. Importantly, both styrene derivatives and unactivated alkenes are for the first time suitable partners for this process. The mild reaction conditions are compatible with a variety of functional groups
我们在这里报告了一种新型的光氧化还原催化的烯丙基三氟甲烷合成。证明使用硫基氨基亚胺作为三氟甲基自由基的来源对于实现高选择性至关重要。重要的是,苯乙烯衍生物和未活化的烯烃都首次是该方法的合适的伙伴。温和的反应条件与各种官能团相容。显着地,该方法易于扩展至其他全氟烷基(R F= CFCl 2,CF 2 Br,C 4 F 9)。还提供了广泛的力学研究。