Protein Modification by Strain-Promoted Alkyne-Nitrone Cycloaddition
作者:Xinghai Ning、Rinske P. Temming、Jan Dommerholt、Jun Guo、Daniel B. Ania、Marjoke F. Debets、Margreet A. Wolfert、Geert-Jan Boons、Floris L. van Delft
DOI:10.1002/anie.201000408
日期:——
Quicker and slicker: An efficient metal‐free 1,3‐dipolar cycloaddition of dibenzocyclooctynes with nitrones proceeded with rate constants of up to 39 M−1 s−1, or up to 300 times faster than similar reactions with azides. This strategy is useful for the site‐specific N‐terminal modification of peptides and proteins (see scheme).
更快、更流畅:二苯并环辛炔与硝酮的高效无金属 1,3-偶极环加成反应速率常数高达 39 M -1 s -1,比使用叠氮化物的类似反应快 300 倍。该策略可用于肽和蛋白质的位点特异性 N 端修饰(参见方案)。
Diastereo- and Enantioselective Synthesis of 1′-C-Branched<i>N</i>,<i>O</i>-Nucleosides
A synthetic approach towards 1'-C-branched N,O-nucleosides is reported, based on 1,3-dipolar cycloaddition of ethoxycarbonylnitrone. The asymmetric version of the process exploits the presence of a chiral auxiliary at the carbon atom of nitrone and leads to beta-D and beta-L nucleosides in good yields.
Reactions at high pressures. [3+2] Dipolar cycloaddition of nitrones with vinyl ethers
作者:Carl Michael Dicken、Philip DeShong
DOI:10.1021/jo00132a014
日期:1982.5
Determination of configuration and conformation of isoxazolidines by nuclear Overhauser effect difference spectroscopy
作者:Philip DeShong、C. Michael Dicken、Ronald R. Staib、Alan J. Freyer、Steven M. Weinreb
DOI:10.1021/jo00144a002
日期:1982.11
Synthesis of functionalized polyhedral oligomeric silsesquioxane (POSS) macromers by microwave assisted 1,3-dipolar cycloaddition
作者:Maria A. Chiacchio、Luisa Borrello、Giovanna Di Pasquale、Antonino Pollicino、Francesco A. Bottino、Antonio Rescifina
DOI:10.1016/j.tet.2005.06.006
日期:2005.8
In this paper we report the first synthesis of isoxazolidine and isoxazoline-POSS macromers by 1,3-dipolar cycloaddition reactions of vinyl- and styryl-POSS with N-methyl-C-ethoxycarbonylnitrone and ethoxycarbonyl nitrile oxide, promoted by microwave irradiation. The nature of the resulting cycloadducts has been determined by NOE experiments and supported by computational studies at PM3 and DFT B3LYP/6-31G* levels. (c) 2005 Elsevier Ltd. All rights reserved.