1284306-40-6Relevant articles and documents
Reaction of dimethyl sulphoxide and trifluoroacetic anhydride with 3-nitro-4-hydroxycoumarin
Ara, Tabassum,Khan, Khaliquz Zaman
experimental part, p. 3397 - 3403 (2010/11/04)
The interaction of dimethyl sulphoxide-trifluoroacetic anhydride (DMSO-TFAA) with 3-nitro-4-hydroxycoumarin (1) gives four products, viz. 2-nitroso-3-oxo-2,3-dihydro-1-benzofuran-2-carboxylic acid (2), 3-(methylthiomethyl]-3-nitro-2H-chromene-2,4(3H)-dione (4), salicylic acid and 4H-[1,3]-dioxolo[4,5-c]chromene-2,4-dione (6).