Mild and Low-Pressure<i>fac</i>-Ir(ppy)<sub>3</sub>-Mediated Radical Aminocarbonylation of Unactivated Alkyl Iodides through Visible-Light Photoredox Catalysis
作者:Shiao Y. Chow、Marc Y. Stevens、Linda Åkerbladh、Sara Bergman、Luke R. Odell
DOI:10.1002/chem.201601694
日期:2016.6.27
unactivated alkyl iodides employing a fac‐Ir(ppy)3‐catalyzed radical aminocarbonylation protocol has been developed. Using a two‐chambered system, alkyl iodides, fac‐Ir(ppy)3, amines, reductants, and CO gas (released ex situ from Mo(CO)6), were combined and subjected to an initial radical reductive dehalogenation generating alkyl radicals, and a subsequent aminocarbonylation with amines affording a
The present invention relates to modulators of muscarinic receptors. The present invention also provides compositions comprising such modulators, and methods therewith for treating muscarinic receptor mediated diseases.
Hybrid Palladium Catalyst Assembled from Chiral Phosphoric Acid and Thioamide for Enantioselective β‐C(sp
<sup>3</sup>
)−H Arylation
作者:Hua‐Jie Jiang、Xiu‐Mei Zhong、Zi‐Ye Liu、Rui‐Long Geng、Yang‐Yang Li、Yun‐Dong Wu、Xinhao Zhang、Liu‐Zhu Gong
DOI:10.1002/anie.202004485
日期:2020.7.27
A hybrid palladium catalyst assembled from a chiral phosphoric acid (CPA) and thioamide enables a highly efficient and enantioselective β‐C(sp3)−Hfunctionalization of thioamides (up to 99 % yield, 97 % ee ). A kinetic resolution of unsymmetrical thioamides by intermolecular C(sp3)−H arylation can be achieved with high s‐factors. Mechanistic investigations have revealed that stereocontrol is achieved
We herein report amide directed enantioselective β‐C(sp3)−Hborylation of unbiased methylene C−H bonds of acyclic amides enabled by iridium catalysis for the first time. The key to the success of this transformation relies on the careful selection of the combination of iridium precursor and chiral bidentate boryl ligands. A variety of functional groups are well‐tolerated, affording chiral β‐functionalized