title: Unprecedented rearrangement of 2-(2-aminoethyl)-1-aryl-3,4-dihydropyrazino[1,2-b]indazole-2-ium 6-oxides to 2,3-dihydro-1H-imidazo[1,2-b]indazoles.
abstract: Easily accessible 2-(2-aminoethyl)-1-aryl-3,4-dihydropyrazino[1,2-b]indazole-2-ium 6-oxides rearranged to 2,3-dihydro-1H-imidazo[1,2-b]indazoles under mild conditions. The rearrangement appeared to be general, tolerated a wide range of functional groups, and provided access to an as yet unexplored class of heterocycles. Herein we report the characterization of these heterocycles.
authors.affiliation: Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: Jan
authors.initials: J
authors.lastname: Kocí
authors.forename: Allen G
authors.initials: AG
authors.lastname: Oliver
authors.forename: Viktor
authors.initials: V
authors.lastname: Krchnák
mesh_terms: D002384:Catalysis; D007093:Imidazoles / Q000737:chemistry*; D007191:Indazoles / Q000737:chemistry*; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D011719:Pyrazines / Q000737:chemistry*; D013329:Structure-Activity Relationship
chemical_list: D007093:Imidazoles; D007191:Indazoles; D010087:Oxides; D011719:Pyrazines