158468-22-5Relevant academic research and scientific papers
A Mesoionic Pyridazinium Sulfonate; an Unexpected Reaction Product
Simonsen, O.,Fanghaenel, E.,Iversen, B. Brummerstedt,Larsen, F. Krebs
, p. 1150 - 1152 (1994)
The title compound is an 'inner' salt: 6-(hydroxyiminomethyl)-4-methyl-1-phenylpyridazinium-3-sulfonate, C12H11N3O4S (1).The pyridazinium ring is almost planar and twisted approximately 50 degree out of the benzene ring plane.The oxime -OH group forms an intermolecular hydrogen bond to one of the sulfonate O atoms.The identification of (1) has revealed an unusual rearrangement.
Nitrosation of 2-Aryl-3,5-dimethyl-1,1-dioxo-1,2-thiazines - an Unusual Ringtransformation to Mesoionic Pyridazinium Salts
Fanghaenel, E.,Hucke, A.,Hasan, H.,Ullrich, K.,Radeglia, R.,Simonsen, O.
, p. 104 - 108 (2007/10/02)
The thiazines 1b-e, g, h react with isoamyl nitrite/HClg by nitrosation of the 3-methyl group to the 3-cyano-thiazines 3b-e, g, h.As by-products the mesoionic pyridazinium salts 4b, c are formed.The compounds 4b-i and 4-1e-i became main products by nitros
