159971-82-1Relevant academic research and scientific papers
An unusual direction of the Richter synthesis. 1H-naphtho[2,3-g]indazole-6,11-diones
Shvartsberg, Mark S.,Ivanchikova, Irena D.,Fedenok, Lidiya G.
, p. 6749 - 6752 (1994)
Diazotization of 2-acetylenic derivatives of 1-aminoanthraquinone followed by intramolecular cyclization leads to the formation in good yields of 1H-3-acyl- or 1H-3-(1,1-dichloroalkyl)naphtho[2,3-g]indazole-6,11-diones, rather than 3-substituted 4-hydroxy
Reaction of 1-amino-2-phenylethynyl- and 2-acylethynyl-1-amino-9,10-anthraquinones with HNO2. Synthesis of 1H-3-acylnaphtho[2,3-g]indazole-6,11-diones
Ivanchikova,Fedenok,Shvartsberg
, p. 105 - 109 (2007/10/03)
The reactions of 1-amino-2-phenylethynyl- and 2-acylethynyl-1-amino-9,10-anthraquinones with HNO2 in a mixture of dioxane and a mineral acid at 20°C were studied. Under these conditions, 2-alkynyl-1-amino-9,10-anthraquinones, irrespective of th
