4H-3,1-Benzoxazine derivatives and their use for controlling undesired plant growth
AssigneeBASF SE
InventorsGerhard Hamprecht, Bruno Wuerzer
Life of this patent
Estimating the term…
Abstract
4H-3,1-Benzoxazine derivatives of the formula ##STR1## where R.sup.1, R.sup.2 and Y have the meanings given in the description, and their use for controlling undesired plant growth.
Claims8
A 4H-3,1-benzoxazine derivative of the formula ##STR11## where Y is oxygen or sulfur, R.sup.1 is halogen and R.sup.2 is halogen in the m- or p-position.
2-(3'-Fluorophenyl)-5-chloro-4H-3,1-benzoxazin-4-one.
2-(3'-Fluorophenyl)-5-fluoro-4H-3,1-benzoxazin-4-one.
A 4H-3,1-benzoxazine derivative of the formula ##STR12## where Y is oxygen or sulfur, R.sup.1 is methyl and R.sup.2 is fluorine, trifluoromethyl, trifluoromethoxy or chlorodifluoromethoxy in the m-position.
A 4H-3,1-benzoxazine derivative of the formula ##STR13## where Y is oxygen or sulfur, R.sup.1 is nitro and R.sup.2 is trifluoromethoxy or chlorodifluoromethoxy.
Dependencies are inferred from the claim text.