| 摘要 |
NEW MATERIAL:The thiadiazolinone compound of formula I or II (R<1> and R<2> are alkyl). EXAMPLE:The thiadiazolinone compound of formula III or formula IV. USE:Antibacterial agent. A chemical modification agent for extending the drug action of cephalosporin antibiotics. A fungicide, etc. PREPARATION:The objective compound of formula I or II is prepared by reacting the cyclopropenium salt of formula V (Z<-> is anion) with semicarbazide in a solvent such as methanol, dimethylformamide, etc. in the presence of a basic substance such as NaOH.
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