Negishi Cross-Coupling Reaction as a Route to Isocombretastatins
摘要:
A series of isocombretastatins A has been synthesized by a new method based on the Negishi cross-coupling reaction in 19-84% yields. Five of the synthesized compounds exhibit high cytotoxic activity in nanomolar concentrations (IC50 = 1-100 nM) towards Jurkat, K562, Colo357, and A549 cell lines.
Photocatalytic C–H Amination of Aromatics Overcoming Redox Potential Limitations
作者:Tatsuya Morofuji、Gun Ikarashi、Naokazu Kano
DOI:10.1021/acs.orglett.0c00822
日期:2020.4.3
report the photocatalytic C–H amination of aromatics overcoming redox potential limitations. Radical cations of aromatic compounds are generated photocatalytically using Ru(phen)3(PF6)2, which has a reduction potential at a high oxidation state (Ered(RuIII/RuII) = +1.37 V vs SCE) lower than the oxidation potentials of aromatic substrates (Eox = +1.65 to +2.27 V vs SCE). The radical cations are trapped
我们报道了克服氧化还原潜在限制的芳香族化合物的光催化C–H胺化反应。使用Ru(phen)3(PF 6)2光催化生成芳香族化合物的自由基阳离子,该Ru(phen)3(PF 6)2在高氧化态下的还原电势(E red(Ru III / Ru II)= +1.37 V vs SCE)低于三氧化二砷。芳香族底物的氧化电位(E ox = +1.65至+2.27 V vs SCE)。自由基阳离子被吡啶捕获,得到N-芳基吡啶鎓离子,该离子被转化为芳族胺。
Diphenylethylene compounds and uses thereof
申请人:Muller W. George
公开号:US20050107339A1
公开(公告)日:2005-05-19
The present invention relates to Diphenylethylene Compounds and compositions comprising a Diphenylethylene Compound. The present invention also relates to methods for preventing or treating various diseases and disorders by administering to a subject in need thereof one or more Diphenylethylene Compounds. In particular, the invention relates to methods for preventing or treating cancer or an inflammatory disorder by administering to a subject in need thereof one or more Diphenylethylene Compounds. The present invention further relates to articles of manufacture and kits comprising one or more Diphenylethylene Compounds.
[EN] ALKYNYL ALCOHOLS AS KINASE INHIBITORS<br/>[FR] ALCOOLS D'ALCYNYLE UTILISÉS COMME INHIBITEURS DE KINASES
申请人:AMGEN INC
公开号:WO2009158011A1
公开(公告)日:2009-12-30
Selected compounds are effective for prophylaxis and treatment of inflammation and inflammatory disorders, such as NIK-mediated disorders. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable salts thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving, inflammation and the like.
[EN] 5- (SUBSTITUTED PHENYL) -THIADIAZOLIDINE-3-ONES AND THEIR USE AS PTP1B<br/>[FR] THIADIAZOLIDINE-3-ONES 5-(PHENYLE SUBSTITUE) ET LEUR UTILISATION EN TANT QU'INHIBITEURS DE PTP1B
申请人:ASTRAZENECA AB
公开号:WO2004041799A1
公开(公告)日:2004-05-21
The invention concerns compounds of the formula (I) or pharmaceutically acceptable salts thereof (A chemical formula should be inserted here - please see paper copy enclosed herewith) wherein R1, R2, R3, R4, R5, and R6 have any of the meanings defined in the description. Processes for the manufacture of compounds of formula (I), compositions containing them, their use as inhibitors of protein tyrosine phosphatase PTP1B and their use for the treatment of diabetes mellitus are also described.
N-heterocycle carbene (NHC)-ligated cyclopalladated N,N-dimethylbenzylamine: a highly active, practical and versatile catalyst for the Heck–Mizoroki reaction
作者:Guang-Rong Peh、Eric Assen B. Kantchev、Chi Zhang、Jackie Y. Ying
DOI:10.1039/b821892g
日期:——
NHC-Pd catalyst, a triflate was coupled with diverse acrylate derivatives (nitrile, tert-butyl ester and amides) and styrene derivatives. The use of excess (>2 equiv.) of the aryl bromide and tert-butyl acrylate leads to mixture of tert-butyl β,β-diarylacrylate and tert-butyl cinnamate derivatives depending on the substitution pattern of the aryl bromide. Electron rich m- and p-substituted arylbromides
催化剂的发展不仅促进了催化方案在学术和工业实验室中的广泛传播,该催化剂不仅具有高活性,而且还易于使用,对湿气,空气和长期储存稳定,易于大规模制备。在本文中,我们描述了由环钯N,N-二甲基苄胺(dmba)与N杂环卡宾1,3-双(甲磺酰基)咪唑-2-亚基(IMes)连接而介导的Heck-Mizoroki反应的方案标准。可以通过三组分,顺序,一锅法反应制得约100 g规模的预催化剂。N,N-二甲基苄胺,PdCl 2和IMes·HCl回流乙腈在空气中存在K 2 CO 3的情况下。这种单组分催化剂对空气,湿气和长期储存稳定,并且可以方便地作为储备溶液分配到NMP中。它介导0.1-2 mol%范围的试剂级NMP中的一系列芳基和杂芳基溴的Heck-Mizoroki反应,而无需严格的无水技术或手套箱,甚至在空气中也具有活性。该催化剂能够实现很高的催化活性(TON高达5.22×10 5),用于偶联失活的芳基溴化物,对溴苯甲醚,以t