In an effort to elucidate degradation mechanisms of an acetanilide herbicide, Butachlor, by soil microorganisms, a common soil fungus, Chaetomium globosum which is known to be powerful was selected and incubated in a Butachlor-contained medium. The results obtained. from the resulting metabolites are as follows:
(1) Dechlorination from Butachlor occurred very easily, remaining almost constant after 180 hrs. of incubation.
(2) More than 10 metabolites were isolated and characterized, of which the metabolites, m/e 205, 177, 223, 182, and 206 were the main products.
(3) In this paper, the structures and pathways of formation of metabolites, m/e 206, 182, 223, 225, and 189 were tentatively proposed.
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