BENZOXAZINE DERIVATIVE AND HERBICIDE CONTAINING SAME AS AN ACTIVE INGREDIENT

摘要

BENZOXAZINE DERIVATIVE AND HERBICIDE CONTAINING SAME AS AN ACTIVE INGREDIENT A benzoxazine derivative having the formula (I) and a salt thereof: ... (I) wherein A represents N or a CY group, where Y represents a hydrogen atom or a halogen atom; X represents a halogen atom; Z represents an oxygen atom or sulfur atom; R1 represents a hydrogen atom, a lower alkyl group which may be also substituted, where the substituent may be either one of a halogen atom, a lower alkoxy group or an aryl group, a lower alkenyl group, a lower alkynyl group or an aliphatic acyl group; R represents a hydrogen atom or a lower alkyl group; R3 represents a carboxyl group which may be esterified or amidated, an aliphatic acyl group which may be also substituted, where the substituent may be either one of a halogen atom, a diazo group or a hydroxyl group which may be also acylated, a lower alkoxythiocarbonyl group, a C(=NR4)R5 group, where R4 represents a hydroxyl group, a lower alkoxy group, a lower alkenyloxy group, a lower alkynyloxy group, an amino group, a lower alkylamino group or an alkoxycarbonylalkyloxy group, R5 represents a lower alkyl group, a C(OR6)2R7 group, where R6 represents a lower alkyl group or a group for forming an alkylen group with two R6,s, R7 represents a lower alkyl group or a C(R8)2OH group, where R8 represents a lower alkyl group and a herbicide containing the same as an effective ingredient.