Benzofuran derivatives useful as inhibitors of bone resorption
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US05858995A1
公开(公告)日:1999-01-12
This invention relates to a novel heterocyclic compound represented by formula (I), wherein each symbol is as defined in the specification and a pharmaceutically acceptable salt thereof which are the inhibitors of bone resorption and bone metabolism, to processes for preparation thereof, to a pharmaceutical composition comprising the same and to a method for the treatment of diseases caused by abnormal bone metabolism in human being or an animal.
Carbene‐Catalyzed Enantioselective Decarboxylative Annulations to Access Dihydrobenzoxazinones and Quinolones
作者:Ansoo Lee、Joshua L. Zhu、Taisiia Feoktistova、Alexander C. Brueckner、Paul H.‐Y. Cheong、Karl A. Scheidt
DOI:10.1002/anie.201900600
日期:2019.4.23
A direct decarboxylative strategy for the generation of aza-o-quinone methides (aza-o-QMs) by N-heterocyclic carbene (NHC) catalysis has been discovered and explored. This process requires no stoichiometric additives in contrast with current approaches. Aza-o-QMs react with trifluoromethyl ketones through a formal [4+2] manifold to access highly enantioenriched dihydrobenzoxazin-4-one products, which
AbstractThe condensation of hydrazine, N-methylhydrazine, and N-phenylhydrazine with ethyl 4-chloro-2-oxo-1,2-dihydroquinoline-3-carboxylate derivatives has been investigated. As a result, 12 new antioxidant pyrazolo[4,3-c]quinolin-3,4-diones were obtained with good to high yields. When two cross-products could be possible, only one isomer bearing the methyl or the phenyl group at the N1 position is
摘要已经研究了肼,N-甲基肼和N-苯基肼与4-氯-2-氧代-1,2-二氢喹啉-3-羧酸乙酯衍生物的缩合。结果,以良好至高产率获得了12种新的抗氧化剂吡唑并[4,3 - c ]喹啉-3,4-二酮。当可能产生两种交叉产物时,仅分离出一个在N1位置带有甲基或苯基的异构体,并使用1D和2D NMR技术,FT-IR和燃烧分析对其进行明确表征。在皮尔逊硬质软酸碱骨架中进行了反应机理的DFT分析,确认了所观察到的吡唑并[4,3- c]的结构。]喹啉-3,4-二酮。这些计算表明,与其可能的区域异构体相比,合成的吡唑并[4,3 - c ]喹啉-3,4-二酮具有良好的动力学控制。 图形概要
Discovery of evodiamine derivatives as potent insecticide candidates
作者:Jingbo Liu、Yabing Shi、Shuting Chen、Fengyun Li、Wen Wen、Yuanhong Wang
DOI:10.1016/j.bmc.2022.116727
日期:2022.5
search for novel more effective insecticides, natural products could be used as ideal template compounds due to their good environmental compatibility, various bioactivities, unique scaffolds and mode of action. We have found that natural product evodiamine, the main active component from the fruits of Evodia rutaecarpa (Juss.) Benth, displayed obvious insecticidal activities against lepidoptera pests
A Practical Method for Preparation of 4-Hydroxyquinolinone Esters
作者:Gregory L. Beutner、Jeffrey T. Kuethe、Nobuyoshi Yasuda
DOI:10.1021/jo071200x
日期:2007.8.31
4-Hydroxyquinolinone esters are a common motif for many medicinal agents. Several methods exist for preparation of these compounds, generally involving the use of sodium hydride, which raises significant safety issues and limits their application to large-scale synthesis. In this note a practical, safe, and general method that employs a combination of diisopropylethylamine and sodium tert-butoxide