几种二卤代吡啶与PhSeNa或HeSeLi在DMF中的反应提供了高产率的单取代产物。用过量的PhSeNa容易得到双(苯基硒烯基)吡啶,而用过量的MeSeLi,由于S N 2取代过程,最初形成的卤代吡啶基甲基硒化物而不是芳香族取代基发生脱烷基反应,得到卤代吡啶基硒酸根阴离子。加入-丙基碘化物,得到卤代吡啶基-丙基硒化物。用过量的MeSeLi处理这些化合物可得到(获得了直接用烷基化剂处理的-丙基硒烯基)吡啶基硒烯酸根阴离子,并获得了高产率的双(烷基硒烯基)吡啶。所有这些亲核芳族取代反应都是完全区域特异性的。
Lithium diselenide in aprotic medium - a convenient reagent for synthesis of organic diselenides
作者:Ludwik Syper、Jacek Mlochowski
DOI:10.1016/s0040-4020(01)89801-x
日期:1988.1
The reduction of selenium with lithium in THF in the presence of diphenylacetylene as a catalyst afforded lithium diselenide, which reacted with electrophiles giving alkyl or aryl diselenides 1 - 3 and selenides 4, as by-products. The useful method for preparation of diselenides based on this reaction was elaborated.
A mechanistic study of the synthesis, single crystal X-ray data and anticarcinogenic potential of bis(2-pyridyl)selenides and -diselenides
作者:Jaspreet S. Dhau、Avtar Singh、Amritpal Singh、Neha Sharma、Paula Brandão、Vítor Félix、Baljinder Singh、Vishal Sharma
DOI:10.1039/c5ra15577k
日期:——
A mechanistic study on LiAlH4 assisted scission of C–Se bond in bis(2-pyridyl)diselenides leading to bis(2-pyridyl)selenides generation has been presented.
One-Pot Synthetic Method of Symmetrical Diaryl Diselenides Using Na<sub>2</sub>Se<sub>2</sub>
作者:Sun-Hee Lee、Saet-Byeul Kim、Myung-Sook Park
DOI:10.5012/jkcs.2011.55.3.546
日期:2011.6.20
Synthesis, characterization, structures and GPx mimicking activity of pyridyl and pyrimidyl based organoselenium compounds
作者:Ananda S. Hodage、C. Parashiva Prabhu、Prasad P. Phadnis、Amey Wadawale、K.I. Priyadarsini、Vimal K. Jain
DOI:10.1016/j.jorganchem.2012.08.035
日期:2012.12
Pyridyl and pyrimidyl based organoselenium compounds have been synthesized and characterized by analytical and spectroscopic techniques. Molecular structures of 2,2'-dipyrimidyl diselenide (1b), 2,2'-dipyrimidyl selenide (2b) and 2-pyrimidyl seleno ethanoic acid (3d) have been determined by single crystal X-ray diffraction analyses. The 3d is associated in the solid state through hydrogen bonding between carboxylic acid proton and N2 of the pyrimidyl ring of an adjacent molecule. The in vitro GPx-like catalytic activity for these compounds was evaluated by H-1 NMR and HPLC methods where H2O2 was reduced by dithiothreitol (DTTred) and glutathione (GSH) as a thiol cofactor, respectively, in the presence of catalytic amounts of organoselenium compounds. The electron density around selenium atom (-SeSe- or -Se-) which is reflected by Se-77H-1} NMR chemical shifts, has been found to be one of the crucial factors in influencing their overall GPx like activity. (C) 2012 Elsevier B.V. All rights reserved.
Relative reactivities of nucleophiles derived from Group VI toward aryl radicals
作者:Adriana B. Pierini、Alicia B. Penenory、Roberto A. Rossi