[EN] DIHYDROBENZOXAZINE AND TETRAHYDROQUINOXALINE SODIUM CHANNEL INHIBITORS [FR] INHIBITEURS DES CANAUX SODIQUES DE TYPE DIHYDROBENZOXAZINE ET TÉTRAHYDROQUINOXALINE
One-Pot Copper-Catalyzed Three-Component Reaction of Sulfonyl Azides, Alkynes, and Allylamines To Access 2,3-Dihydro-1H-imidazo[1,2-a]indoles
作者:Bingwei Zhou、Yunkui Liu、Hongwei Jin、Daohong Liu
DOI:10.1055/s-0037-1610739
日期:2020.5
A copper-catalyzed multicomponent reaction of sulfonylazides, alkynes, and allylamines affording 2,3-dihydro-1H-imidazo-[1,2-a]indoles in moderate yields is reported. Four C–N bonds are constructed by way of azide-alkyne cycloaddition (CuAAC) and double Ullmann-type coupling reactions in a one-pot process.
Rhodium-Catalyzed Intramolecular C−H Silylation by Silacyclobutanes
作者:Qing-Wei Zhang、Kun An、Li-Chuan Liu、Shuangxi Guo、Chenran Jiang、Huifang Guo、Wei He
DOI:10.1002/anie.201602376
日期:2016.5.17
Silacyclobutane was discovered to be an efficient C−H bond silylation reagent. Under the catalysis of RhI/TMS‐segphos, silacyclobutane undergoes sequential C−Si/C−H bond activations, affording a series of π‐conjugated siloles in high yields and regioselectivities. The catalytic cycle was proposed to involve a rarely documented endocyclic β‐hydride elimination of five‐membered metallacycles, which after
发现硅环丁烷是一种有效的CH键甲硅烷基化试剂。在Rh I / TMS-segphos的催化下,硅环丁烷经历了连续的C-Si / C-H键活化,从而以高收率和区域选择性提供了一系列π-共轭硅化物。有人提出催化循环涉及很少有文献记载的五元金属环的环内β-氢化物消除,在还原性消除后会产生能够进行CH活化的Si-Rh I物种。
Copper-Catalyzed Annulation: A Method for the Systematic Synthesis of Phenanthridinium Bromide
in situ formed biaryl imine as a substrate. Tolerance of a very wide variety of N-substituents is indicated; this has never previously been disclosed by other reports. Application of this method to synthesis of the natural alkaloid bicolorine, and its derivatives, was also carried out in only three synthetic steps from commercially available compounds.
Enantioselective Relay Catalytic Cascade Intramolecular Hydrosiloxylation and Mukaiyama Aldol Reaction
作者:Pu-Sheng Wang、Kang-Nan Li、Xiao-Le Zhou、Xiang Wu、Zhi-Yong Han、Rui Guo、Liu-Zhu Gong
DOI:10.1002/chem.201300702
日期:2013.5.10
Cascading chemistry! The first practical relaycatalyticcascadeintramolecularhydrosiloxylation of arylacetylene and asymmetric Mukaiyamaaldolreaction has been established to give synthetically useful products in high yields and with excellent ee (see scheme).
Catalytic Properties of Chromium Complexes Based on 1,2-Bis(diphenylphosphino)benzene in the Ethylene Oligomerization Reaction
作者:D. N. Cheredilin、A. M. Sheloumov、A. A. Senin、G. A. Kozlova、V. V. Afanas’ev、N. B. Bespalova
DOI:10.1134/s0965544119130036
日期:2019.12
catalyst systems of a number of diphosphine ligands and chromium complexes based on 1,2-bis(diphenylphosphino)benzene in the ethylene oligomerization reaction has been studied. Structural modifications of diphosphine ligands have been performed to create selective catalyst systems for ethylene oligomerization. It has been shown that the introduction of ortho-functional groups into one of the phenyl substituents