Structure-activity relationships of herbicidal 3-phenyl substituted derivatives of 1,2,3-benzotriazin-4-ones, 4(3H)-quinazolinones, and 2,4(1H,3H)-quinazolinediones

摘要

Structure-herbicidal activity relationships of sixty title compounds were studied. Substitution of a hydrogen on 2, 5, 7, or 8 position on the heterocycle decreased herbicidal activity, and a methyl on 1 position of the 2,4(lH,3H)-quinazolinediones provided greatest activity. The most active compound was 3-[(2-F-4-Cl-5-propargyloxy)phenyl]-l,2,3-benzotriazin-4-one.