New reaction of 1H-pyrazoles with selenium dioxide: one-pot synthesis of bis(1H-pyrazol-4-yl)selenides
作者:Maksym Seredyuk、Igor O. Fritsky、Roland Krämer、Henryk Kozłowski、Matti Haukka、Philipp Gütlich
DOI:10.1016/j.tet.2010.08.071
日期:2010.11
A novel reaction between 3- and 3,5-substituted pyrazoles with selenium dioxide proceeds with formation of bis(3R,5R′-1H-pyrazol-4-yl)selenides in high yield. On this basis, an efficient one-pot synthetic procedure has been developed. In the case of the unsubstituted pyrazole a selenonium compound has been obtained. The identity and structure of the isolated selenium derivatives have been confirmed