Evaluation of Silica-H2SO4 as an Efficient Heterogeneous Catalyst for the Synthesis of Chalcones
作者:Aeysha Sultan、Abdul Raza、Muhammad Abbas、Khalid Khan、Muhammad Tahir、Nazamid Saari
DOI:10.3390/molecules180810081
日期:——
We report an efficient silica-H2SO4 mediated synthesis of a variety of chalcones that afforded the targeted compounds in very good yield compared to base catalyzed solvent free conditions as well as acid or base catalyzed refluxing conditions.
The invention relates to compounds of formula (I): (I) as described herein, pharmaceutical preparations comprising such compounds, uses and methods of use for such compounds in the treatment of a disorder or a disease mediated by the activity of as MDM2 and/or MDM4, and combinations comprising such compounds.
The invention relates to compounds of formula (I): (I) as described herein, pharmaceutical preparations comprising such compounds, uses and methods of use for such compounds in the treatment of a disorder or a disease mediated by the activity of as MDM2 and/or MDM4, and combinations comprising such compounds.
作者:Stephen E. de Laszlo、Candice Hacker、Bing Li、Dooseop Kim、Malcolm MacCoss、Nathan Mantlo、James V. Pivnichny、Larry Colwell、Gregory E. Koch、Margaret A. Cascieri、William K. Hagmann
DOI:10.1016/s0960-894x(99)00081-5
日期:1999.3
The SAR of 2-pyridyl-3,5-diaryl pyrroles, ligands of the human glucagon receptor and inhibitors of p38 kinase, were investigated. This effort resulted in the identification of 2-(4-pyridyl)-5-(4-chlorophenyl)-3-(5-bromo-2-propyloxyphenyl)pyrrole 49 (L-168,049), a potent (Kb = 25 nM), selective antagonist of glucagon. (C) 1999 Elsevier Science Ltd. All rights reserved.
The ortho effect: copper-catalyzed highly enantioselective 1,4-conjugate addition of diethylzinc to chalcones
作者:Lan-Tao Liu、Min-Can Wang、Wen-Xian Zhao、Yan-Li Zhou、Xiao-Dan Wang
DOI:10.1016/j.tetasy.2005.11.031
日期:2006.1
The copper-catalyzed enantioselective 1,4-conjugate addition of diethylzinc to chalcones was investigated in the presence of a catalytic amount of NP-ferrocenyl ligands with central and planar chirality under mild conditions (0 degrees C -> rt). It was found that chalcones with ortho-substituents (from ortho-substituted benzaldehydes and acetophenone/substituted acetophenones) led to a dramatic improvement in the enantio selectivities. The (R)- and (S)-antipodes of the addition reaction were obtained with up to 92% ee after this transformation. (c) 2006 Published by Elsevier Ltd.