Copper Catalyzed Regioselective and Stereospecific Aziridine Opening with Pyridyl Grignard Nucleophiles
作者:Jaehee Lee、Xuan Ju、Miseon Lee、Qi Jiang、Hwanjong Jang、Wan Shin Kim、Linglin Wu、Suja Williams、Xiao-Jun Wang、Xingzhong Zeng、Jenna Payne、Zhengxu S. Han
DOI:10.1021/acs.orglett.2c00703
日期:2022.4.15
Copper catalyzed regioselective and stereospecificcoupling between aziridines and in situ generated pyridine Grignard reagents is reported. This method provides β-pyridylethylamines with diverse structures and functionalities from aziridines and iodopyridines. β-Pyridylethylamines are potential scaffolds for the synthesis of biologically active compounds often found in pharmaceuticals. The synthesis
Mechanistic Insights of Copper Catalyzed Trifluoromethyl Aziridine Opening: Regioselective and Stereospecific Aryl Grignard Addition
作者:Miseon Lee、Dennis Sulwey、Madeline E. Rotella、Wan Shin Kim、Xuan Ju、Qi Jiang、Marisa C. Kozlowski、Jaehee Lee
DOI:10.1021/acs.orglett.3c01122
日期:2024.4.12
The coppercatalyzed regioselective and stereospecific opening of CF3-aziridines is reported. This method focuses on the synthesis of α-CF3-β-arylethylamines, which can be potential key intermediates in the synthesis of synthetic analogues and biologically active molecules. Density functional theory calculations reveal the nature of the active copper species and the role of the LiClMgX2 (X = Cl or
Design, Synthesis, and Pharmacological Evaluation of Second Generation EZH2 Inhibitors with Long Residence Time
作者:Avinash Khanna、Alexandre Côté、Shilpi Arora、Ludivine Moine、Victor S. Gehling、Jehrod Brenneman、Nico Cantone、Jacob I. Stuckey、Shruti Apte、Ashwin Ramakrishnan、Kamil Bruderek、William D. Bradley、James E. Audia、Richard T. Cummings、Robert J. Sims、Patrick Trojer、Julian R. Levell
DOI:10.1021/acsmedchemlett.0c00045
日期:2020.6.11
Histone methyltransferase EZH2, which is the catalytic subunit of the PRC2 complex, catalyzes the methylation of histone H3K27-a transcriptionally repressive post-translational modification (PTM). EZH2 is commonly mutated in hematologic malignancies and frequently overexpressed in solid tumors, where its expression level often correlates with poor prognosis. First generation EZH2 inhibitors are beginning to show clinical benefit, and we believe that a second generation EZH2 inhibitor could further build upon this foundation to fully realize the therapeutic potential of EZH2 inhibition. During our medicinal chemistry campaign, we identified 4-thiomethyl pyridone as a key modification that led to significantly increased potency and prolonged residence time. Leveraging this finding, we optimized a series of EZH2 inhibitors, with enhanced antitumor activity and improved physiochemical properties, which have the potential to expand the clinical use of EZH2 inhibition.