Switchable Ring-Contractive Extrusion Reactions of 2,5-Dihydro-1,4,5-thiadiazepine S-Oxides: Entries to Pyridazines or Pyrazoles.
Bin ChengYuntong LiHui LiXinping ZhangTaimin WangYun LiHongbin Zhai
Published in: The Journal of organic chemistry (2020)
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.