A direct one-step preparation of triarylverdazylium salts from the corresponding triarylformazans

Article abstract of DOI:10.1055/s-1997-1516

6-(4-Substituted-phenyl)-2,4-diphenylverdazylium salts 2 (8 examples, 55-93%) were prepared by the reaction of 3-(4-substituted-phenyl)-1,5-diphenylformazans 1 with formaldehyde and different organic and inorganic acids in a two-phase chloroform/water med