2-METHYLENE-5-SUBSTITUTED-METHYLENECYCLOPENTANONE DERIVATIVES AND USE THEREOF
申请人:Zhao Linxiang
公开号:US20110060054A1
公开(公告)日:2011-03-10
The invention relates to 2-methylene-5-substituted-methylenecyclopentanone derivatives of formula I, and the use thereof. The derivatives of formula I as active components are useful for preparing a medicine for the treatment and/or prevention of cancer diseases such as breast cancer, lung cancer, colon cancer, rectal cancer, stomach cancer, prostate cancer, bladder cancer, uterus cancer, pancreatic cancer and ovary cancer. The active compounds of the invention may be used as an anticancer drug alone or used in combination with one or more other antitumor drugs. A combined therapy can be carried out by administrating each therapeutic component concurrently, subsequently or separately.
A novel entry to xanthones by an intramolecular Diels-Alder reaction involving 2-(1,2-dichlorovinyloxy) aryl dienones
作者:Katerina Otrubova、Anne E. Fitzgerald、Neelakandha S. Mani
DOI:10.1016/j.tet.2018.08.007
日期:2018.9
of syntheticmethods are described in the literature for the preparation of xanthones—a prominent class of tricyclic molecules that occur widely in nature. Majority of these reported methods involve linking the two aromatic rings and forming the central pyrone ring using a variety of classical and non-classical cyclization strategies. In a conceptually different approach, we describe here a new xanthone
The present invention is directed to novel compounds, to a process for their preparation, their use in therapy and pharmaceutical compositions comprising the novel compounds.
本发明涉及新化合物,以及用于它们制备的方法,它们在治疗中的应用以及包含这些新化合物的药物组合物。
A general route to α-alkyl (E)-α,β-unsaturated aldehydes
作者:Nour Lahmar、Jamaa Aatar、Taïcir Ben Ayed、Hassen Amri、Moncef Bellassoued
DOI:10.1016/j.jorganchem.2006.03.015
日期:2006.6
Bis(trimethylsilyl)-tert-butylaldimines 3 react with aldehydes in the presence of zinc bromide at room temperature to give, after hydrolysis, the desired α-alkyl α,β-ethylenic aldehydes in good yield and with very high Estereoselectivity. The reaction was believed to proceed via the α-silyl β-siloxyimines 4.
Syntheses of amino nitrones. Potential intramolecular traps for radical intermediates in monoamine oxidase-catalyzed reactions
作者:Boyu Zhong、Xingliang Lu、Richard B. Silverman
DOI:10.1016/s0968-0896(98)80016-3
日期:1998.12
an amine radical cation and an alpha-radical during enzyme catalysis, there is no direct, i.e. EPR, evidence for these species as they are formed. Amino nitrones have been designed which, upon radical formation would produce an intermediate that is a resonance structure of the corresponding nitroxyl radical, which should be observable by EPR spectroscopy. Syntheses of seven different amino nitrones