Mechanistic Insights from the Gas-Phase Reactivity of Phosphorus-Ylid-Supported Benzylidene Gold Complexes
作者:Alexey Fedorov、Peter Chen
DOI:10.1021/om100224h
日期:2010.7.12
The chemoselectivity as a function of ligand electronic properties was studied for the adducts of phosphorus-ylid-supported gold benzylidenes with methyl vinyl ether by gas-phase collision-induced dissociation experiments. The daughter channels were identified as cyclopropanation, metathesis, and regeneration of the starting benzylidene carbene via olefin loss. The observed product ratios provided linear Hammett plots with a negative slope for the cyclopropanation channel and similar positive p values for metathesis and olefin loss. These results are consistent with the presence of a gold-coordinated cyclopropane intermediate as a global minimum energy structure in the gas phase, from which the pathways to the different products proceed. Additionally, we discuss the anomalous case of the para-dimethylamino gold benzylidene species, which appears to be too stabilized to engage in the reactivity under investigation.
Design, Synthesis, and Biological Evaluation of Benzimidazole Derivatives as Potential Lassa Virus Inhibitors
作者:Jinwei Chen、Likun Xu、Baogang Wang、Dongna Zhang、Liangliang Zhao、Zhuchun Bei、Yabin Song
DOI:10.3390/molecules28041579
日期:——
there are still no effective treatments available, creating an urgent need to develop novel therapeutics. Some benzimidazole compounds targeting the arenavirus envelope glycoprotein complex (GPC) are promising inhibitors of LASV. In this study, we synthesized two series of LASV inhibitors based on the benzimidazole structure. Lentiviral pseudotypes bearing the LASV GPC were established to identify virus