Enantioselective Palladium(II)-Catalyzed Intramolecular Aminoarylation of Alkenes by Dual N−H and Aryl C−H Bond Cleavage
作者:Wen Zhang、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.201700889
日期:2017.5.2
An asymmetric palladium‐catalyzed intramolecular oxidative aminoarylation of alkenes has been developed with quinoline–oxazoline chiral ligands and Ag2CO3 as the oxidant. Various indolines containing a quaternary stereogenic center were synthesized in high yield with excellent enantioselectivity. Preliminary mechanistic studies suggest that the addition of a catalytic amount of phenylglyoxylic acid
用喹啉-恶唑啉手性配体和Ag 2 CO 3作为氧化剂,开发了不对称钯催化的烯烃分子内氧化氨基芳基化反应。含有四元立体异构中心的各种二氢吲哚以高产率合成,具有出色的对映选择性。初步的机理研究表明,加入催化量的苯乙醛酸可显着加快反应速度,并略微提高对映选择性。
Pd<sup>II</sup>
-Catalyzed Oxidative Tandem aza-Wacker/Heck Cyclization for the Construction of Fused 5,6-Bicyclic N,O-Heterocycles
A PdII‐catalyzedoxidative tandem cyclization was developed for the construction of fused 5,6‐bicyclic N, O‐heterocycles. This reaction was enabled by the combined use of a 3‐methylpyridine ligand and pentafluorobenzoic acid additive. A range of heterocyclic products with different substituents could be prepared in moderate to good yields via this methodology. Several transformations, including a scaled‐up
Synthesis of Highly Functionalized Decalins via Metallacycle-Mediated Cross-Coupling
作者:Haruki Mizoguchi、Glenn C. Micalizio
DOI:10.1021/jacs.5b02107
日期:2015.5.27
cascade reactions it was later discovered that these bridged bicyclic intermediates can be trapped by various elimination processes. Here, we have realized metallacycle-mediated annulation reactions for the assembly of angularly substituted decalins--structural motifs that are ubiquitous in natural products and molecules of pharmaceutical relevance. In addition to defining the basic annulation reaction we
Enantioselective Synthesis of Silicon‐Stereogenic Monohydrosilanes by Rhodium‐Catalyzed Intramolecular Hydrosilylation
作者:Yu‐Hao Huang、Yichen Wu、Zile Zhu、Sujuan Zheng、Zihang Ye、Qian Peng、Peng Wang
DOI:10.1002/anie.202113052
日期:2022.1.3
An intramolecularhydrosilylation strategy was developed for the asymmetric synthesis of chiral monohydrosilanes. This protocol is suitable for the synthesis of dihydrobenzosilole-, tetrahydrobenzosiline- and oxatetrahydrobenzosiline-based monohydrosilanes with excellent diastereo-, regio-, and enantioselectivities. Notably, the catalyst loading could be reduced to 0.1 mol %.