Switchable ring-contractive extrusion reactions of 2,5-dihydro-1,4,5-thiadiazepine oxides are described, which allow expedient access to pyridazines under thermal conditions or pyrazoles under Lewis acid-mediated conditions.
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Switchable Ring-Contractive Extrusion Reactions of 2,5-Dihydro-1,4,5-thiadiazepine -Oxides: Entries to Pyridazines or Pyrazoles.
J Org Chem
January 2020
Institute of Marine Biomedicine, Shenzhen Polytechnic , Shenzhen 518055 , China.
Switchable ring-contractive extrusion reactions of 2,5-dihydro-1,4,5-thiadiazepine oxides are described, which allow expedient access to pyridazines under thermal conditions or pyrazoles under Lewis acid-mediated conditions.
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