Synthesis and Biological Evaluation of Novel Indolin-2-One Derivatives as Protein Tyrosine Phosphatase 1B Inhibitors
作者:Hou-Ling Dai、Qiang Shen、Jian-Bin Zheng、Jing-Ya Li、Ren Wen、Jia Li
DOI:10.2174/157017811796504909
日期:2011.9.1
3-Substituted indolin-2-one derivatives had been designed and synthesized as a novel class of protein tyrosine phosphatase 1B (PTP1B) inhibitors. These compounds had been evaluated for their inhibitory activities against PTP1B in vitro with IC50 values in a low micromolar range. Compound 36, the lowest, bore an IC50 value of 3.48 µ M. Preliminary structure-activity relationship was summarized.
Pd‐Catalysed Decarbonylation Free Approach to Carbonylative Esterification of 5‐HMF to Its Aryl Esters Synthesis Using Aryl Halides and Oxalic Acid as C
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作者:Arvind Singh Chauhan、Ajay Kumar、Ajay Kumar Sharma、Pralay Das
DOI:10.1002/chem.202101827
日期:2021.9.9
(Pd@PS)-catalysed carbonylative esterification of the hydroxy group of 5-hydroxymethyl furfural (5-HMF) to its corresponding aryl esters has been developed. The use of Pd@PS, oxalic acid as CO source, and aryl halides was first explored for the aryl ester of 5-HMF synthesis. Here, we investigated the vital role of a polystyrene support to avoid the commonly known decarbonylation of 5-HMF. The reaction
Palladium-catalyzed regioselective allylation of five-membered heteroarenes with allyltributylstannane
作者:Sheng Zhang、Xiaoqiang Yu、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1039/c4cc10373d
日期:——
Palladium-catalyzedallylation reactions of 2-(chloromethyl)thiophenes, 2-(chloromethyl)furans, and N-protected 2-(chloromethyl)-1H-pyrroles with allyltributylstannane were described in this study. This type of allylation reaction regioselectively occurred on the heteroarene rings to produce allylated dearomatization products or allylated heteroarenes with satisfactory yields.
FURAN DERIVATIVES FOR PREVENTING AND CURING OSTEOPOROSIS AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME
申请人:Kim Jung-Keun
公开号:US20080221205A1
公开(公告)日:2008-09-11
The present invention relates to furan derivatives and pharmaceutical compositions containing them to prevent and cure osteoporosis. The furan derivatives of the present invention have effect on bone proliferation with the side effect reduced, so that they can be used for bone disease.
Synthesis of Symmetric Bis(<i>N</i>-alkylaniline)triarylmethanes via Friedel–Crafts-Catalyzed Reaction between Secondary Anilines and Aldehydes
作者:Rafael F. A. Gomes、Jaime A. S. Coelho、Raquel F. M. Frade、Alexandre F. Trindade、Carlos A. M. Afonso
DOI:10.1021/acs.joc.5b01875
日期:2015.10.16
The first general protocol for the preparation of symmetric triarylmethanes bearing secondary anilines by ytterbium-catalyzed Friedel–Crafts reaction of hetero(aryl) aldehydes and secondary anilines is reported. Mechanistic studies indicated that the iminium ion intermediate is the electrophilic partner. The reaction is greatly accelerated by high pressure (9 kbar) and showed a broad substrate scope