| 摘要 |
NEW MATERIAL:The compound of formula I or II [R<1> is (halogen or lower alkyl-substituted) phenyl; R<2> is (halogen or lower alkyl-substituted) phenyl or benzyl or 1-10C alkyl]. EXAMPLE:(Z)-4-benzylidene-3-phenylthio-2-buten-4-olide. USE:A physiologically active compound useful as an antibacterial, bactericidal or insecticidal agent, etc., and its synthetic intermediate. PREPARATION:3-Phenylthio-2-buten-4-olide compound of formula III is made to react with an aldehyde of formula R<2>-CHO (e.g. benzaldehyde) and the product is subjected to intramolecular dehydration reaction optionally after separation and purification.
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