Factors controlling, the selenium-induced cyclizations of alkenyl hydrazines to pyridazine or pyrrolidinamine derivatives

Article abstract of DOI:10.1016/S0040-4020(97)00670-4

4-Pentenyl hydrazines, CH₂=CHCH₂CH₂CH₂NHNHR, react with phenylselenenyl sulfate, produced by diphenyl diselenide, ammonium persulfate and trifluoromethanesulfonic acid, to afford phenylseleno-substituted hexahydropyridazine or pyrrolidinamine derivatives depending on the nature of the substituent R.