Palladium(II)-Catalyzed Intramolecular Diamination of Unfunctionalized Alkenes
作者:Jan Streuff、Claas H. Hövelmann、Martin Nieger、Kilian Muñiz
DOI:10.1021/ja055190y
日期:2005.10.1
Intramolecular diamination reactions are described which yield cyclic ureas as direct products of an oxidative alkene transformation in the presence of palladium acetate and iodosobenzenediacetate as terminal oxidant. The reaction is truly catalytic in metal catalyst and represents the proof of principle for this elusive type of alkene oxidation.
Regioselective Copper(II)-Mediated Bromoamination of Unfunctionalized Olefins: An Efficient Route to N-Heterocyclic Compounds
作者:Gong-Qing Liu、Zhen-Ying Ding、Li Zhang、Ting-Ting Li、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1002/adsc.201301125
日期:2014.7.7
Bromoamination of unfunctionalized olefins was realized under mild conditions using copper(II) bromide (CuBr2) as both reaction promoter and bromine source. The reactions could be carried out under open air at ambient temperature, and both N‐alkylated and N‐tosylated substrates could be converted to the corresponding N‐heterocyclic compounds in high regioselectivity and good isolated yields. A variety
Copper-Catalyzed Redox-Triggered Remote CH Functionalization: Highly Selective Formation of CCF<sub>3</sub>
and CO Bonds
作者:Taotao Li、Peng Yu、Jin-Shun Lin、Yonggang Zhi、Xin-Yuan Liu
DOI:10.1002/cjoc.201500891
日期:2016.5
CH/unactivated alkenes functionalization reaction for the concomitant construction of CCF3 and CO bonds was described. An 1,5‐H radical transfer involving an sp3 CH bond adjacent to a nitrogen atom and an α‐CF3‐alkylradicalintermediate derived from unactivated alkenes was observed and demonstrated to proceed via the radical process.
Enantioselective CH Bond Functionalization Triggered by Radical Trifluoromethylation of Unactivated Alkene
作者:Peng Yu、Jin-Shun Lin、Lei Li、Sheng-Cai Zheng、Ya-Ping Xiong、Li-Jiao Zhao、Bin Tan、Xin-Yuan Liu
DOI:10.1002/anie.201405401
日期:2014.10.27
An asymmetric unactivatedalkene/CHbond difunctionalization reaction for the concomitant construction of CCF3 and CO bonds was realized by using a Cu/Brønsted acid cooperative catalytic system, thus providing facile access to valuable chiral CF3‐containing N,O‐aminals with excellent regio‐, chemo‐, and enantioselectivity. Mechanistic studies revealed that this reaction may proceed by an unprecedented
不对称非活化烯烃/ C 为C的伴随建筑H键difunctionalization反应 CF 3和C O键是通过使用Cu /布朗斯台德酸催化的合作系统,从而提供了有价值的手性CF容易访问实现3含Ñ ,O-缩醛胺具有出色的区域,化学和对映选择性。机制研究表明,该反应可以通过涉及未活化烯烃的活化和自由基三氟甲基化以引发的C后续的对映选择性的官能化了前所未有的1,5-氢化移继续H键。对照实验还表明,手性布朗斯台德酸起多种作用,不仅控制立体选择性,而且还通过激活Togni试剂提高了反应速率。
One-pot Construction of Difluorinated Pyrrolizidine and Indolizidine Scaffolds via Copper-Catalyzed Radical Cascade Annulation
作者:Xiaoyang Wang、Miao Li、Yanyan Yang、Minjie Guo、Xiangyang Tang、Guangwei Wang
DOI:10.1002/adsc.201701643
日期:2018.6.5
A convenient approach to the synthesis of diverse difluorinated nitrogen‐containing polycycles via a copper‐catalyzed radical cascade annulation of amine‐containing olefins and ethyl bromodifluoroacetate was developed. Three new bonds, including a −CF2 and two C−N bonds, are forged simultaneously in this strategy. Through this strategy, a series of difluorinated pyrrolizidine and indolizidine derivatives