Switchable Ring Contractive Extrusion Reactions of 2,5 Dihydro 1,4,5 thiadiazepine S Oxides: Entries to Pyridazines or Pyrazoles.
Switchable ring contractive extrusion reactions of 2,5 dihydro 1,4,5 thiadiazepine S oxides are described, which allow expedient access to pyridazines under thermal conditions or pyrazoles under Lewis acid mediated conditions, respectively.
The Journal of organic chemistry