The Ras Pathway Modulator Melophlin A Targets Dynamins
作者:Tanja Knoth、Karin Warburg、Catherine Katzka、Amrita Rai、Alexander Wolf、Andreas Brockmeyer、Petra Janning、Thomas F. Reubold、Susanne Eschenburg、Dietmar J. Manstein、Katja Hübel、Markus Kaiser、Herbert Waldmann
DOI:10.1002/anie.200902023
日期:2009.9.14
combination of organic synthesis, chemical proteomics, biophysics, and cell and molecular biology investigations reveals that the natural product melophlin A (purple) influences signal propagation through the Ras network by interfering with the function of dynamins (green) in endocytosis.
Electrochemical synthesis of versatile ammonium oxides under metal catalyst-, exogenous-oxidant-, and exogenous-electrolyte-free conditions
作者:Yong Yuan、Liang-Sen Li、Lin Zhang、Feng Wang、Lin Jiang、Lin Zuo、Qi Wang、Jian-Guo Hu、Aiwen Lei
DOI:10.1039/d1cc00486g
日期:——
An electrochemical oxidative cross-coupling reaction between 2.5-substituted-pyrazolin-5-ones and ammoniumthiocyanate has been developed, which resulted in a series of unprecedented cross-coupling products under metal catalyst-, exogenous-oxidant-, and exogenous-electrolyte-free conditions. It is worth noting that since the resulting cross-coupling products are nearly insoluble in MeCN, the pure product
A novelconvergent method for the synthesis of α-acyl-γ-hydroxylactams utilizing the aldol reaction of N-Boc-protected γ-methoxylactams was developed. As the first application of this method for the synthesis of biologically active natural products, the totalsynthesis of platelet aggregation inhibitors PI-090 and PI-091 were also investigated and successfully achieved.
Polycyclic ring-fused 2-pyridones (5a-e and 9a-e) have been prepared via a microwave-assisted acyl-ketene imine cyclocondensation. Starting from 3,4-dihydroisoquinolines (4a-b) or 3,4-dihydroharman (8), fused 2-pyridones could be prepared in a one-step procedure. By using either Meldrum's acid derivatives (1a-d) or 1,3-dioxine-4-ones (7a-b) as acyl-ketene sources, mono- or disubstitution of the fused