부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.chemosphere.2005.03.068 Byline: Mia B. Gents (a), Susan T. Nielsen (a), Anne G. Mortensen (a), Carsten Christophersen (b), Inge S. Fomsgaard (a) Keywords: Degradation; 6-hydroxy-benzoxazolin-(3H)-one; N-(2-hydroxyphenyl)malonamic acid; 2-Aminophenyl acetate; Identification; LC-MS; Allelochemicals Abstract: Three degradation experiments were performed to examine the formation of transformation products from 2-benzoxazolinone (BOA) in different soil types and concentrations. In two experiments using BOA in low concentration (400[mu]gkg.sup.-1) only one unidentified transformation product was found, whereas in the degradation experiment in high concentration (400mgkg.sup.-1) several metabolites occurred. Two of these metabolites, 2-amino-(3H)-phenoxazin-3-one (APO); and 2-acetylamino-(3H)-phenoxazin-3-one (AAPO) were synthesized to prove their identity. This is the first time that the successive formation of these types of compounds from BOA is shown in soil. A number of other APO related transformation products were detected and provisionally characterized. The formation of APO, which is a much more biologically active compound than BOA, and the concurrent formation of a number of other APO-related metabolites in soil underline the importance of performing transformation studies as part of the evaluation of the effect of allelochemicals on weeds and soil-borne diseases. Author Affiliation: (a) Danish Institute of Agricultural Sciences, Research Centre Flakkebjerg, DK-4200 Slagelse, Denmark (b) University of Copenhagen, Chemical Institute, Universitetsparken 5, 2100 Copenhagen, Denmark Article History: Received 15 July 2004; Revised 8 February 2005; Accepted 7 March 2005