Synthesis and bioactivity of novel 3-(1-hydroxyethylidene)-5-substituted-pyrrolidine-2,4-dione derivatives
摘要:
Ten novel 5-substituted derivatives of 3-(1-hydroxyethylidene)pyrrolidine-2,4-dione were synthesized. The compounds were confirmed by IR, H-1 NMR, MS and elemental analysis. The bioassay indicated that these compounds showed noticeable herbicidal activities, and compounds 6f and 6j exhibited excellent inhibitory activities against the stalk of Echinochloa crusgalli, with EC50 values of 94.4 and 72.7 mg/L, respectively. (C) 2012 Chun Long Yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Oleanolic acid and its derivatives: New inhibitor of protein tyrosine phosphatase 1B with cellular activities
作者:Yi-Nan Zhang、Wei Zhang、Di Hong、Lei Shi、Qiang Shen、Jing-Ya Li、Jia Li、Li-Hong Hu
DOI:10.1016/j.bmc.2008.07.080
日期:2008.9
Proteintyrosinephosphatase1B is a key factor in the negative regulation of insulin pathway and a promising target for treatment of diabetes and obesity. Herein, a series of competitive inhibitors were optimized from oleanolic acid, a natural triterpenoid identified against PTP1B by screening libraries of traditional Chinese medicinal herbs. Modifying at 3 and 28 positions, we obtained compound 13
Ligand-Enabled <i>meta</i>-Selective C–H Arylation of Nosyl-Protected Phenethylamines, Benzylamines, and 2-Aryl Anilines
作者:Qiuping Ding、Shengqing Ye、Guolin Cheng、Peng Wang、Marcus E. Farmer、Jin-Quan Yu
DOI:10.1021/jacs.6b11097
日期:2017.1.11
meta-selective C-H arylation of nosyl-protected phenethylamines and benzylamines is disclosed using a combination of norbornene and pyridine-based ligands. Subjecting nosyl protected 2-aryl anilines to this protocol led to meta-C-H arylation at the remote aryl ring. A diverse range of aryl iodides are tolerated in this reaction, along with select heteroaryl iodides. Select aryl bromides bearing ortho-coordinating
Haloalkyl containing compounds as cysteine protease inhibitors
申请人:Link O. John
公开号:US20050182096A1
公开(公告)日:2005-08-18
The present invention is directed to compounds that are inhibitors of cysteine proteases, in particular, cathepsins B, K, L, F, and S and are therefore useful in treating diseases mediated by these proteases. The present invention is directed to pharmaceutical compositions comprising these compounds and processes for preparing them.
Haloalkyl Containing Compounds as Cysteine Protease Inhibitors
申请人:Link O. John
公开号:US20070276019A1
公开(公告)日:2007-11-29
The present invention is directed to compounds that are inhibitors of cysteine proteases, in particular, cathepsins B, K, L, F, and S and are therefore useful in treating diseases mediated by these proteases. The present invention is directed to pharmaceutical compositions comprising these compounds and processes for preparing them.
Synergistic Catalysis between a Dipeptide Phosphonium Salt and a Metal‐Based Lewis Acid for Asymmetric Synthesis of
<i>N</i>
‐Bridged [3.2.1] Ring Systems
作者:Yuan Chen、Jiajia He、Cheng Zhuang、Zanjiao Liu、Kai Xiao、Zhishan Su、Xiaoyu Ren、Tianli Wang
DOI:10.1002/anie.202207334
日期:2022.9.19
method for asymmetric construction of N-bridged [3.2.1] rings by a phosphoniumsalt/silver co-catalyzed cyclization has been developed. This route affords fluorine-installed tropane derivatives in excellent stereoselectivities. The mechanistic results revealed that the silver nitrite was installed on the phosphoniumsalt via hydrogen bonding and simultaneously activated the dipole, in a “sandwich” reaction