EPR Study of Spin Labeled Brush Polymers in Organic Solvents
作者:Yan Xia、Yongjun Li、Alan O. Burts、M. Francesca Ottaviani、David A. Tirrell、Jeremiah A. Johnson、Nicholas J. Turro、Robert H. Grubbs
DOI:10.1021/ja2085349
日期:2011.12.14
dimethylsulfoxide (DMSO), the backbone end labels were shown to be more mobile than the middle labels. Reduction of the nitroxide labels by a polymeric reductant revealed location-dependent reactivity of the nitroxide labels: peripheral nitroxides were much more reactive than the backbone nitroxides. In contrast, almost no difference was observed when a small molecule reductant was used. These results
5-Ethoxymethylidene-4-thioxo-2-thiazolidinone as Versatile Building Block for Novel Biorelevant Small Molecules with Thiopyrano[2,3-<i>d</i>][1,3]thiazole Core
5-Ethoxymethylidene-4-thioxo-2-thiazolidinone was studied as versatile core building block in the synthesis of new thiopyrano[2,3-d]thiazole derivatives relevant for medicinal chemistry purposes under hetero-Diels-Alder reaction conditions. Promising compounds (6, 10) were identified among synthesized series with high antitumor and moderate antiviral activity. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]
Synthesis of Novel Exocyclic Allenes with a Norbornene Fragment
作者:A. F. Mukhametyanova、I. M. Sakhautdinov、T. R. Nugumanov、M. S. Yunusov
DOI:10.1134/s1070428019050105
日期:2019.5
N-Substituted amino acids with a norbornene fragment were synthesized by the direct fusion of amino acids with endic anhydride at 150°C. The synthesized compounds were used for one-pot synthesis of novel stable allenes with an exocyclic cumulene group derived from l-phenyl-3-(triphenylphosphoranylidene)-pyrrolidine-2,5-dione has been carried out.