1,3-oxazine-4-one derivatives, methods for their preparation and intermediates for their manufacture, and their uses as herbicides

摘要

The present invention relates to a 1,3-oxazin-4-one derivative represented by the following general formula (I):;In the above formula,;R ¹ is a phenyl group which may be substituted;;R ² is a hydrogen atom or a lower alkyl group;;R ³ is a hydrogen atom, a lower alkyl group, an aralkyl group, or a phenyl group which may be substituted;;R ⁴ and R ⁵ are each a lower alkyl group;;W is an oxygen atom or a group represented by the general formula -N (R ⁶ )-(wherein R ⁶ is a hydrogen atom, a lower alkyl group, a lower alkenyl group or a lower alkynyl group).;The present invention also relates to a herbicide composition containing the 1,3-oxazin-4-one derivative and an N-methylene amino acid ester derivative represented by the following general formula (II), which is an intermediate for use in preparing the same. Is about:;In the above formula,;R ⁴ and R ⁵ are each a lower alkyl group;;R ¹⁰ is a lower alkyl group or an aralkyl group.;These compounds according to the invention exhibit a strong herbicidal effect and are therefore useful as active ingredients in agricultural chemicals.