Recyclization of 2-imino-2H-1-benzopyrans under the influence of nucleophilic reagents. 2. Reaction of 2-iminocoumarin-3-carboxamides with o-aminobenzenesulfonamide

Article abstract of DOI:10.1007/BF02251684

2-Iminocoumarin-3-carboxamides recyclized into 3-(1,1-dioxo-2H-benzo-1,2,4-thiadiazinyl-3)coumarins under the influence of o-aminobenzenesulfonamide. An alternative method of synthesis is discussed. Proposed mechanisms for the recyclization are discussed.