Identifying a Highly Active Copper Catalyst for KA<sup>2</sup>
Reaction of Aromatic Ketones
作者:Yujuan Cai、Xinjun Tang、Shengming Ma
DOI:10.1002/chem.201504823
日期:2016.2.12
The well‐established A3 coupling reaction of terminal alkynes, aldehydes, and amines provides the most straightforward approach to propargylic amines. However, the related reaction of ketones, especially aromatic ketones, is still a significant challenge. A highly efficient catalytic protocol has been developed for the coupling of aromatic ketones with amines and terminal alkynes, in which CuI, generated
CuBr for KA2 reaction: en route to propargylic amines bearing a quaternary carbon center
作者:Xinjun Tang、Jinqiang Kuang、Shengming Ma
DOI:10.1039/c3cc45301d
日期:——
A highly efficient CuBr-catalyzed coupling of ketones, amines and alkynes (KA2) forming propargylic amines bearing a quaternary carbon center with the broadest scope so far has been developed.
Improving the Catalytic Activity of Au<sub>25</sub>
Nanocluster by Peeling and Doping
作者:Man-bo Li、Shi-kai Tian、Zhikun Wu
DOI:10.1002/cjoc.201600526
日期:2017.5
the novel cadmium doped goldnanocluster Au26Cd5 shows high catalyticactivity, as well as good recyclability and substrate tolerance for the same reaction. The high catalyticactivity is attributed to the cooperation between the exerted cadmium atoms and the neighbor goldatoms on the surface of Au13 icosahedron. This work has important implication for the tuning of nanoclusters’ compositions and structures
调整纳米团簇的组成和结构对于提高纳米团簇的性能至关重要。在此,著名的Au 25(SCH 2 CH 2 Ph)18(简称Au 25)纳米簇已转变为稀有的掺杂镉的金纳米簇[Au 13 Cd 2(PPh 3)6(SC 2 H 4 Ph)6(NO 3)2 ] 2 Cd(NO 3)4(简称Au 26 Cd 5)通过剥离和掺杂。虽然金25在研究条件下对A 3偶联反应没有催化活性,新型镉掺杂金纳米簇Au 26 Cd 5表现出高催化活性,并且对同一反应具有良好的可回收性和底物耐受性。高催化活性归因于所施加的镉原子与Au 13二十面体表面上的相邻金原子之间的协作。这项工作对于通过一些不寻常但有效的策略来改进纳米团簇的组成和结构具有重要的意义。