Conformational analysis and diastereotopic assignments in the series of selenium-containing heterocycles by means of 77Se-1H spin-spin coupling constants: a combined theoretical and experimental study
作者:Yury Yu. Rusakov、Leonid B. Krivdin、Vladimir A. Potapov、Maxim V. Penzik、Svetlana V. Amosova
DOI:10.1002/mrc.2760
日期:2011.7
A combined theoretical and experimental study on the stereochemical behavior of (77)Se-(1)Hspin-spincouplingconstants has been performed at the second-order polarization propagator approach level together with heteronuclear multiple-bond correlation technique in the series of selenium-containing four-, five- and six-membered heterocycles including the derivatives of thiaselenetane, selenasilole
Reactions of selenium dichloride and dibromide with divinyl sulfone: synthesis of novel four- and five-membered selenium heterocycles
作者:Vladimir A. Potapov、Evgeny O. Kurkutov、Maxim V. Musalov、Svetlana V. Amosova
DOI:10.1016/j.tetlet.2010.07.133
日期:2010.10
The reactions of selenium dichloride and dibromide with divinyl sulfone leading to novel selenium heterocycles, 2,4-bis(halomethyl)-1,3-thiaselenetane-1,1-diones and 5-halo-2-halomethyl-1,3-thiaselenolane-1,1-diones, have been studied. Under the action of silica gel or pyridine, 5-halo-2-halomethyl-1,3-thiaselenolane-1,1-diones undergo facile regioselective dehydrohalogenation into 5-halo-2-methylene-1