Re-cyclization of 3-(E)-methyl 3-(4-oxo-4H-chromen-3-yl)acrylate with amines and their potential mechanism
摘要:
The synthesis of 2-pyridone derivatives from different substituted amines and various 3-(E)-methyl 3-(4-oxo-4H-chromen-3-yl)acrylate derivatives was proposed and described. The optimized reaction conditions and the generality of the reaction were investigated, respectively. Moreover, less side products could be formed than the traditional method. Finally, based on the fact that (E)-methyl 2-(7-methoxy-4-oxo-3-((phenylamino)methylene)chroman-2-yl)acetate was separated and determined via X-ray single crystal diffraction, we could propose an interesting and reasonable reaction mechanism for the first time. The reaction could render this method particularly attractive for the efficient preparation of biologically and medicinally interesting molecules. (c) 2013 Elsevier Ltd. All rights reserved.
Synthesis, Antiproliferative, and c-Src Kinase Inhibitory Activities of 4-Oxo-4H-1-benzopyran Derivatives
摘要:
A new class of 4‐oxo‐4H‐1‐benzopyran derivatives were synthesized and their antiproliferative activity examined against a panel of three human cancer cell lines, that is, breast carcinoma (MDA‐MB‐468), ovarian adenocarcinoma (SK‐OV‐3), and colorectal adenocarcinoma (HT‐29). Two compounds, that is, 3‐hexyl‐7,8‐dihydroxy‐4‐oxo‐4H‐1‐benzopyran and (E)‐ethyl 3‐(7‐methoxy‐4‐oxo‐4H‐1‐benzopyran‐3‐yl)acrylate were found to be potent against all three cancer cell lines studied at 50 μM concentration. Also, the inhibitory potency of the compounds was evaluated against active Src kinase. A few of these compounds exhibited modest Src kinase inhibitory activity (IC50 = 52–57 μM). Structure‐activity relationship studies with respect to the nature and position of substituents on the lead compounds could be further exploited for the design and development of more potent antiproliferative agents and/or Src kinase inhibitors.
Efficient Heck cross-coupling of 3-iodo-benzopyrones with olefins under microwave irradiation without phosphine
作者:Yikai Zhang、Zhiliang Lv、Hanyu Zhong、Mingfeng Zhang、Tao Zhang、Wannian Zhang、Ke Li
DOI:10.1016/j.tet.2012.09.017
日期:2012.11
different terminal olefins with various 3-iodo-benzopyrones including stericallyhindered, electron-rich, electron-neutral, and electron-deficient is developed. It proceeded faster and generally gave good to excellent yields under microwave irradiation, phosphine-free, and air condition. The reaction could render this method particularly attractive for the efficient preparation of biologically and
Heck Cross-Coupling Reactions in Ionic Liquid mediated Pd Nanocatalysts
作者:Prashant Gautam、Vivek Srivastava
DOI:10.2174/1570178617999200723124636
日期:2021.5
of palladium nanoparticles by using a series of palladium metal precursors and ionicliquids. All the materials went for XRD, TEM, and ICPOES analysis, before going to Heck cross-coupling reaction as a catalyst. We evaluated the catalytic performance of our developed IL#Pd MNP catalyst over Heck cross-coupling reaction between different terminal olefins with various 3-iodo-benzopyrones, including sterically