Stereochemical behavior of <sup>77</sup>
Se-<sup>1</sup>
H spin-spin coupling constants in pyrazolyl-1,3-diselenanes and 1,2-diselenolane
作者:Yury Yu. Rusakov、Leonid B. Krivdin、Lyubov K. Papernaya、Alexandra A. Shatrova
DOI:10.1002/mrc.2863
日期:2012.2
stereochemical trends of geminal and vicinal (77)Se-(1)H spin-spin coupling constants has been carried out by means of high-level theoretical calculations in combination with experiment. The marked dihedral angle dependences for both types of couplings accounted for the lone pair effect in the case of geminal coupling constants and the Karplus-typerelationship for vicinal couplings have been established
Synthesis of the first representative of 2-pyrazolyl-1,3-diselenanes, 3,5-dimethyl-1-(prop-2-en-1-yl)-4-(1,3-diselenan-2-yl)-1H-pyrazole
作者:L. K. Papernaya、A. A. Shatrova、E. P. Levanova、A. I. Albanov、E. V. Rudyakova、G. G. Levkovskaya
DOI:10.1134/s1070428012090217
日期:2012.9
Selenoacetalyzation of 4-Formylpyrazoles in the Presence of Trimethylchlorosilane
作者:Lyubov K. Papernaya、Alexandra A. Shatrova、Ekaterina P. Levanova、Alexandr I. Albanov、Lyudmila V. Klyba、Elena V. Rudyakova、Galina G. Levkovskaya
DOI:10.1002/hc.21113
日期:2013.11
The reaction of 3,5-dimethyl-4-formylpyrazoles, bearing various substituents at N-1 atom, with propane-1,3-diselenol and 2-hydroxypropane-1,3-diselenol in the presence of ТМSCl proceeds without heating to chemoselectively give hitherto unknown 2-(pyrazol-4-yl)-1,3-diselenane hydrochlorides in high yields. The latter are easily transformed to the corresponding free bases—2-(pyrazol-4-yl)-1,3-diselenanes