Creating Dynamic Nanospaces in Solution by Cationic Cages as Multirole Catalytic Platform for Unconventional C(sp)−H Activation Beyond Enzyme Mimics
作者:Kang Li、Kai Wu、Yu‐Lin Lu、Jing Guo、Peng Hu、Cheng‐Yong Su
DOI:10.1002/anie.202114070
日期:2022.1.26
The generation of permeable porous-cage nanospaces in solution by a highly charged cationic [Pd6(RuL3)8]28+ cage for multirole and multi-way supramolecular catalysis is reported.
Orientation and Substituent Effects on the Properties of the Diacetylene-Group Connected Octaethylporphyrin–Dihexylbithiophene Derivatives (OEP–DHBTh–X) Carrying Electron-Withdrawing Groups
Orientational isomers of the octaethylporphyrin–dihexylbithiophene (OEP–DHBTh) derivatives connected with a diacetylene linkage were synthesized, with various electron-withdrawing substituents X attached at the ends. The effects of DHBTh orientation and X substituent on the properties of OEP–DHBTh–X (X = H, Br, CN, CHO, and NO2) were studied and compared with those of related OEP derivatives.
Effect of Varying the Anionic Component of a Copper(I) Catalyst on Homologation of Arylacetylenes to Allenes by the Mannich Reaction
作者:Vipan Kumar、Alex Chipeleme、Kelly Chibale
DOI:10.1002/ejoc.200700859
日期:2008.1
The effect of varying the anionic component of a copper(I) catalyst in the homologation of terminal arylacetylenes to allenes by the Mannichreaction was investigated. Varying amounts of allenes, Mannich bases and dimers were obtained depending on the nature of the anionic component of the copper catalyst. On the other hand, Eglinton–Glaser dimerizations were achieved in high yields with 0.5 equiv
Subnanometer Gold Clusters on Amino-Functionalized Silica: An Efficient Catalyst for the Synthesis of 1,3-Diynes by Oxidative Alkyne Coupling
作者:Beáta Vilhanová、Jiří Václavík、Luca Artiglia、Marco Ranocchiari、Antonio Togni、Jeroen A. van Bokhoven
DOI:10.1021/acscatal.7b00691
日期:2017.5.5
on amino-functionalized silica catalyze Glaser-type alkyne coupling, providing corresponding 1,3-diynes under mild conditions. Readily available λ3-iodane PhI(OAc)2 is used as an oxidant and 1,10-phenanthroline is used as an additive. Ten symmetrical 1,3-diynes and three products of heterocoupling containing various functionalities are isolated in high yields. The catalyst can be recycled at least
<i>p</i>-Phenyleneethynylene Molecular Wires: Influence of Structure on Photoinduced Electron-Transfer Properties
作者:Mateusz Wielopolski、Carmen Atienza、Timothy Clark、Dirk M. Guldi、Nazario Martín
DOI:10.1002/chem.200800159
日期:2008.7.18
tetrathiafulvalene (exTTF) as electron donor and fullerene (C60) as electron acceptor has been prepared by following a convergent synthesis. The key reaction in these approaches is the bromo-iodo selectivity of the Hagihara-Sonogashira reaction and the deprotecting of acetylenes with different silyl groups to afford the corresponding donor-acceptor conjugates in moderate yields. The electronic interactions between the