Publication | Closed Access
Heterocyclization of 2,4‐disubstituted thiosemicarbazides with haloketones
35
Citations
3
References
1990
Year
HeterocyclicH ‐1,3,4‐ThiadiazinesReaction MechanismOrganic ChemistryUnexpected 2,3‐Dihydro‐1,3,4‐thiadiazoleChemistryHeterocycle ChemistryPharmacologyEnantioselective Synthesis
Abstract 2,4‐Disubstituted thiosemicarbazides were allowed to react with α ‐bromoacetophenone to give the anticipated 2,3‐dihydro‐6 H ‐1,3,4‐thiadiazines, whereas with β‐propiophenone and γ‐butyrophenone to afford the unexpected 2,3‐dihydro‐1,3,4‐thiadiazole. The reaction mechanism was also discussed.
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