Access to <i>gem</i>-Dibromoenones Enabled by Carbon-Centered Radical Addition to Terminal Alkynes in Water Solution
作者:Xianghua Zeng、Yuhai Xu、Jiawei Liu、Yuanyuan Deng
DOI:10.1021/acs.orglett.1c03305
日期:2021.12.3
We herein report a novel and more practical approach to prepare gem-dibromoenones from terminalalkynes, tetrabromomethane (CBr4), and water in a single step. Mechanistic studies reveal that the generation of a tribromomethyl radical with the assistance of a persulfate salt (K2S2O8) is essential to this transformation. The reaction features readily available chemicals, a broad substrate scope, a green
本文我们报告一个新的和更实际的方法来制备宝石从末端炔烃,四溴甲烷(CBR -dibromoenones 4在单个步骤中),和水。机理研究表明,在过硫酸盐(K 2 S 2 O 8)的帮助下生成三溴甲基自由基对于这种转化是必不可少的。该反应具有易得的化学品、广泛的底物范围、绿色溶剂和温和的反应条件,为构建卤素取代的烯酮提供了有效的替代方案。
PYRAZOLE SUBSTITUTED IMIDAZOPYRAZINES AS CASEIN KINASE 1 D/E INHIBITORS
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150344480A1
公开(公告)日:2015-12-03
The invention provides compounds of Formula (I) and pharmaceutically acceptable salts thereof. The compounds of Formula (I) inhibit protein kinase activity thereby making them useful as anticancer agents.
[EN] PYRAZOLE SUBSTITUTED IMIDAZOPYRAZINES AS CASEIN KINASE 1 D/E INHIBITORS<br/>[FR] UTILISATION D'IMIDAZOPYRAZINES À SUBSTITUTION PYRAZOLE COMME INHIBITEURS DE CASÉINE KINASE 1 D/E
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2014100540A1
公开(公告)日:2014-06-26
The invention provides compounds of Formula (I) and pharmaceutically acceptable salts thereof. The compounds of Formula (I) inhibit protein kinase activity thereby making them useful as anticancer agents.
Functionalized β,β-dichloroenones and β,β-dibromoenones as versatile building blocks: Synthesis and transformations
作者:Dengke Li
DOI:10.1016/j.tetlet.2021.153551
日期:2021.12
functionalized β,β-dichloroenones and β,β-dibromoenones was achieved via the Fe-catalyzed radical induced reactionbetween silyl enol ethers and carbontetrachloride, bromotrichloromethane or carbon tetrabromide in moderate to good yields. This reaction proceeds through addition of the trichloromethyl or tribromomethyl radical group to the CC bond of the silyl enol ethers and subsequent base-induced elimination
通过甲硅烷基烯醇醚与四氯化碳、溴三氯甲烷或四溴化碳之间的 Fe 催化自由基诱导反应,以中等至良好的收率实现了功能化β,β-二氯烯酮和β,β-二溴烯酮的高效一步合成。该反应通过将三氯甲基或三溴甲基自由基添加到甲硅烷基烯醇醚的 C C 键上并随后在温和条件下进行碱诱导消除来进行。