Palladium-Catalyzed Coupling of Sulfonylhydrazones with Heteroaromatic 2-Amino-Halides (Barluenga Reaction): Exploring the Electronics of the Sulfonylhydrazone
作者:Hongyu Tan、Ioannis Houpis、Renmao Liu、Youchu Wang、Zhilong Chen、Matthew J. Fleming
DOI:10.1021/acs.oprd.5b00211
日期:2015.8.21
paper describes a new reactivity of the Pd-catalyzed coupling of 2-amino-3-bromo-aromatic and heteroaromatic compounds with sulfonylhydrazones (Barluenga reaction).The new catalyst system and modulation of the electronic nature of hydrazone that were needed for successful reaction are described herein.
A mild and efficient approach for highly regio- and enantioselective copper-catalyzed hydroboration of 1,1-diaryl substituted alkenes with bis(pinacolato)diboron (B2Pin2) was developed for the first time, providing facile access to a series of valuable β,β-diaryl substituted boronic esters with high enantiomeric purity. Moreover, this approach could also be suitable for hydroboration of α-alkyl styrenes
Preparation and characterization of chelating monoolefin-aniline ligands and their platinum(II) complexes
作者:Mervyn K. Cooper、Darryl W. Yaniuk
DOI:10.1016/s0022-328x(00)89058-0
日期:1981.12
have been prepared and treated with platinum(II). 1H NMR spectra of the ligands and their platinum(II) complexes have been recorded in order to investigate the bonding between the platinum and the olefin group. This has shown that all the olefins except o-vinyl-N,N-diphenylaniline bond to the platinum through both the olefin and the amine group to give complexes similar to those formed by the chelating
已经制备了许多新的螯合单烯烃-苯胺配体并用铂(II)处理。为了研究铂与烯烃基团之间的键合,已记录了配体及其铂(II)配合物的1 H NMR光谱。这表明除邻-乙烯基-N,N-二苯基苯胺以外的所有烯烃均通过烯烃和胺基团与铂键合,从而产生与螯合单烯烃-膦和-ar基形成的络合物相似的络合物。
Intramolecular Cyclizations of Vinyl-Substituted <i>N</i>,<i>N</i>-Dialkyl Arylamines Enabled by Borane-Assisted Hydride Transfer
作者:Jun-Jie Tian、Ning-Ning Zeng、Ning Liu、Xian-Shuang Tu、Xiao-Chen Wang
DOI:10.1021/acscatal.8b04485
日期:2019.1.4
Catalytic amounts of B(C6F5)3 have been found to be able to promote the intramolecular cyclization of vinyl-substituted N,N-dialkyl arylamines to afford nitrogen-containing heterocycles. Our mechanistic studies indicate the reaction is initiated by abstraction of an α-hydride from an N-alkyl substituent by B(C6F5)3, which is followed by cyclization, and is concluded by delivery of the hydride to the
已经发现催化量的B(C 6 F 5)3能够促进乙烯基取代的N,N-二烷基芳基胺的分子内环化,从而提供含氮杂环。我们的机理研究表明,该反应是通过B(C 6 F 5)3从N-烷基取代基中提取一个氢化物引发的,然后进行环化反应,并通过将该氢化物传递至环状阳离子中间体而结束。B(C 6 F 5)3的双重作用首先用作氧化剂,然后用作携带氢化物的还原剂,使sp 3碳与富电子烯烃之间罕见的氧化还原中性环化过程得以实现,而无需使用过渡金属或外部氧化剂。