Phenylselenenyl sulfate induced cyclization of allylhydrazines. Synthesis of pyrazole derivatives
作者:Marcello Tiecco、Lorenzo Testaferri、Francesca Marini、Luana Bagnoli、Claudio Santi、Andrea Temperini
DOI:10.1016/s0040-4020(97)00116-6
日期:1997.3
Allylhydrazines react with phenylselenenyl sulfate, produced by diphenyl diselenide and ammonium persulfate in the presence of trifluoromethanesulfonic acid, to afford phenylseleno substituted pyrazolidines. Under the reaction conditions employed, these suffer dehydrogenation and oxidative deselenenylation to eventually give pyrazole derivatives. (C) 1997 Elsevier Science Ltd.