13C NMR Study of N-Acyl- and N-Sulphonyl-isatins and their Ring-Opened Derivatives

Article abstract of DOI:10.1002/mrc.1260300102

The complete assignments of the 13C NMR resonances of 1-acetyl-, 1-benzoyl-, 1-benzenesulphonyl-, 1-methanesulphonyl- and 1-(2-nitrobenzenesulphonyl)-isatins and their ring-opened glyoxylic derivatives are reported.The 13C assignments of acylisatins were derived from isatin as a model, while assignments of glyoxylic derivatives were made by complete assignment of compound 8b together with its use as a model. KEY WORDS: 13C NMR, 1-Acyl-2,3-dihydroindole-2,3-diones, 2-Acylamidophenylglyoxylic acid derivatives