| 摘要 |
3-(5-Chloro-2-pyridyl)rhodanine and 3-(5-chloro-2-pyridyl)-5-(lower alkyl)rhodanines. The compounds are anti-parasitic agents having nematocidal activity. They can be produced by cyclization of 5-chlorodithio-2-pyridinecarbamic acid, 1-carboxyalkyl esters. The latter compounds can be produced by reacting a tertiary amine salt of 5-chlorodithio-2-pyridinecarbamic acid with a haloalkanoic acid salt followed by acidifying the product. Tertiary amine salts of 5-chlorodithio-2-pyridinecarbamic acid can be produced by reacting 2-amino-5-chloropyridine with carbon disulfide and a tertiary amine.
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