Preorganised Dipeptide Mimics as Foldamer Building Blocks
作者:Nicola Castellucci、Claudia Tomasini
DOI:10.1002/ejoc.201300194
日期:2013.6
Preorganised dipeptide mimics containing a 3,4-disubstituted oxazolidin-2-one, a flexible methylene group, and a 1,4-disubstituted triazole have been prepared in a few steps and high yield by copper-catalysed azide–alkyne cycloaddition (CuAAC). The combination of these three moieties allows the formation of a new dipeptide mimic that favours the formation of bent conformations, as we could demonstrate by
通过铜催化的叠氮化物-炔环加成 (CuAAC),通过几步高产率制备了含有 3,4-二取代 oxazolidin-2-one、柔性亚甲基和 1,4-二取代三唑的预组织二肽模拟物. 这三个部分的组合允许形成新的二肽模拟物,有利于弯曲构象的形成,正如我们可以通过 IR 和 ROESY 分析所证明的那样。
PYRAZOLYL DERIVATIVES AS SYK INHIBITORS
申请人:Merck Sharp & Dohme Corp.
公开号:US20150191461A1
公开(公告)日:2015-07-09
The present invention provides novel pyrazole derivatives of formula I which are potent inhibitors of spleen tyrosine kinase, and are useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD, rheumatoid arthritis, and cancer.
The present invention provides novel pyrazole derivatives of formula I which are potent inhibitors of spleen tyrosine kinase, and are useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD, rheumatoid arthritis, and cancer.
Pd-Catalyzed Carboamination of Oxazolidin-2-ones: A Stereoselective Route to <i>trans</i>-2,5-Disubstituted Pyrrolidines
作者:Georgia S. Lemen、John P. Wolfe
DOI:10.1021/ol1006828
日期:2010.5.21
Palladium-catalyzed carboamination reactions between aryl bromides and 4-(but-3-enyl)-substituted oxazolidin-2-ones are described. These transformations afford bicyclic oxazolidin-2-one derivatives that can be converted to trans-2,5-disubstituted pyrrolidines in one step. The starting materials are easily prepared from amino acid precursors, and products that contain up to three stereocenters are generated with >20:1 dr.