| abstract |
Novel pyrimidin-4-one derivatives of formula (1) are provided, which are useful as active ingredients of herbicides, wherein R1 is hydrogen or alkyl; R2 is alkyl optionally substituted with halogen; R3 is alkyl optionally substituted with halogen, alkenyl, or alkynyl; and Q is substituted phenyl. Also provided are intermediates for their production and processes for producing these intermediates. |