Algicidal and fungicidal 1-halo-2-substituted-thioethyl sulfones, 2-substituted-thiovinyl sulfones, and 1,2-dihalothioethyl sulfones

摘要

1-Halo-2-alkylthioethyl and 1-halo-2-arylthioethyl sulfones, having algicidal and fungicidal activity, are prepared by the addition of arylsulfenyl or alkylsulfenyl halides to alkyl or aryl vinyl sulfones. The thioethyl sulfone products are treated with a base to produce 2-alkylthiovinyl or 2-arylthiovinyl sulfones, which also have algicidal and fungicidal activity. The vinyl sulfones are halogenated to produce 1,2-dihalothioethyl sulfones, which have superior fungicidal activity, especially for tomato and celery late blight.