Abstract: The present invention provides a process for producing the pyridine compound [d]: [wherein R3 and R4 are as defined below], which has an excellent herbicidal activity, by making a pyridine compound [a]: [wherein R1 represents a C1–C6 alkoxy group, R3 represents a halogen atom, cyano group or nitro group, and R4 ?????????? ? ???????? ???? ?? ??????? ????] ????? ???? ?? ?-diazoester compound [f]: N2CHCOR1[f] [wherein R1 is defined above] in the presence of an acid.

Abstract: The present invention provides a process for producing the pyridine compound [d]: [wherein R3 and R4 are as defined below], which has an excellent herbicidal activity, by making a pyridine compound [a]: [wherein R1 represents a C1–C6 alkoxy group, R3 represents a halogen atom, cyano group or nitro group, and R4 represents a hydrogen atom or halogen atom] react with an ?-diazoester compound [f]: N2CHCOR1[f] [wherein R1 is defined above] in the presence of an acid.

Abstract: The present invention provides a process for producing the pyridine compound [d]: [wherein R3 and R4 are as defined below], which has an excellent herbicidal activity, by making a pyridine compound [a]: [wherein R1 represents a C1-C6 alkoxy group, R3 represents a halogen atom, cyano group or nitro group, and R4 ?????????? ? ???????? ???? ?? ??????? ????] ????? ???? ?? ?-diazoester compound [f]: N2CHCOR1??[f] [wherein R1 is defined above] in the presence of an acid.

Abstract: Novel pyridazin-3-one derivatives of formula [1] are provided, which are useful as active ingredients of herbicides, wherein R1 is haloalkyl; R2 and R3 are hydrogen, alkyl, haloalkyl, or alkoxyalkyl; and Q is [Q-1], [Q-2], [Q-3], [Q-4] or [Q-5]. Also provided are their use and intermediates for their production.

Abstract: The present invention provides a process for producing the pyridine compound [d]: 1

Abstract: Novel hydrazones having the following structural formula are provided, which are useful intermediates to form active ingredients of herbicides, wherein R3 is hydrogen, alkyl, haloalkyl, or alkoxy alkyl; and Q is [Q1-1], [Q-2], [Q1-3], [Q-4] or [Q-5] defined herein.

Abstract: Novel pyridazin-3-one derivatives of formula [1] are provided, which are useful as active ingredients of herbicides, wherein R1 is haloalkyl; R2 and R3 are the same or different and are hydrogen, alkyl, haloalkyl, or alkoxyalkyl; and Q is [Q-1], [Q-2], [Q-3], [Q-4], or [Q-5]. Also provided are their use and intermediates for their production.

Abstract: The present invention relates to an uracil compound of the formula [I]: wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R1 represents C1 to C3 alkyl or C1 to C3 haloalkyl; R2 represents C1 to C3 alkyl; R4 represents hydrogen or methyl; R5 represents C1 to C6 alkyl, C1 to C6 haloalkyl, or the like; X1 represents halogen, cyano or nitro; X2 represents hydrogen or halogen; and each of X3 and X4 independently represents hydrogen, halogen, C1 to C6 alkyl, or the like. The present compound has an excellent herbicidal activity.

Abstract: The present invention relates to an uracil compound of the formula [I]: 1

Abstract: The present invention relates to an uracil compound of the formula [I]: [wherein, Q—R3 represents a R3-substituted group of a 5-membered or 6-membered heterocyclic ring having one or two nitrogen selected from the group consisting of moieties represented in the specification (wherein, this heterocyclic ring may be substituted with at least one kind of substituent, Y represents oxygen, sulfur, imino or C1 to C3 alkylimino, R1 represents C1 to C3 alkyl or C1 to C3 haloalkyl, R2 represents C1 to C3 alkyl, R3 represents carboxy C1 to C6 alkyl, C1 to C6 alkoxycarbonyl C1 to C6 alkyl, OR7, SR8, N(R9)R10 or the like, X1 represents halogen, cyano, thiocarbamoyl or nitro, X2 represents hydrogen or halogen. {wherein, each of R7, R8 and R10 independently represents carboxy C1 to C6 alkyl, C1 to C6 alkoxycarbonyl C1 to C6 alkyl, C1 to C6 haloalkoxycarbonyl C1 to C6 alkyl, or the like, and R9 represents hydrogen or C1 to C6 alkyl.}.].

Abstract: Novel pyridazin-3-one derivatives of formula [1] are provided, which are useful as active ingredients of herbicides, wherein R1 is haloalkyl; R2 and R3 are the same or different and are hydrogen, alkyl, haloalkyl, or alloxyalky; and Q is [Q-2] Also provided are their use and intermediates for their production.

Abstract: The present invention relates to an uracil compound of the formula [I]: wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R1 represents C1 to C3 alkyl or C1 to C3 haloalkyl; R2 represents C1 to C3 alkyl; R4 represents hydrogen or methyl; R5 represents C1 to C6 alkyl, C1 to C6 haloalkyl, or the like; X1 represents halogen, cyano or nitro; X2represents hydrogen or halogen; and each of X3 and X4 independently represents hydrogen, halogen, C1 to C6 alkyl, or the like. The present compound has an excellent herbicidal activity.

Abstract: The present invention provides an uracil compound of the formula: wherein A1 represents amino or C1-C3 alkyl, A2 represents C1-C3 haloalkyl, X represents hydrogen or halogen, Y represents halogen, R1 represents —OR21, —ON(R22)R23, —ON═C(R24)R25, —SR26, —N(R27)R28, —N(29)OR30, —N(R31)SO2R32 or —N(R33)N(R34)R35, and R2, R3, R4 and R5 independently represent hydrogen or C1-C3 alkyl and a herbicidal composition comprising the above uracil compound as an active ingredient. The uracil compound has excellent herbicidal activity.

Abstract: The present invention relates to an optically active uracil compounds of the formula (I): wherein, R1 is C1-C8 alkyl or C3-C8 alkenyl, and * represents an asymmetric carbon atom whose configuration is R. The compounds have excellent herbicidal activity.

Abstract: Novel hydrazones of formula [2] having the following structural formula are provided, which are useful intermediates to form active ingredients of herbicides, wherein R3 is hydrogen, alkyl, haloalkyl, or alkoxy alkyl; and Q is [Q-1], [Q-2], [Q-3], [Q-4] or [Q-5] as defined herein.

Abstract: The present invention relates to an uracil compound of the formula [I]: 1

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.

Abstract: Novel pyrimidin-4-one derivatives of formula [1] are provided, which are useful as active ingredients of herbicides, wherein R.sup.1 is hydrogen or alkyl; R.sup.2 is alkyl optionally substituted with halogen; R.sup.3 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.

Abstract: Novel pyridazin-3-one derivatives of formula [1] are provided, which are useful as active ingredients of herbicides, wherein R.sup.1 is haloalkyl; R.sup.2 and R.sup.3 are the same or different and are hydrogen, alkyl, haloalkyl, or alkoxyalkyl; and Q is [Q-1], [Q-2], [Q-3], [Q-4], or [Q-5]. Also provided are their use and intermediates for their production.

Abstract: Novel pyrazin-2-one derivatives of formula [1] are provided, ##STR1## which are useful as active ingredients of herbicides, wherein R.sup.1 is hydrogen or alkyl; R.sup.2 is haloalkyl; R.sup.3 is optionally substituted alkyl; alkenyl, or alkynyl; and Q is optionally substituted phenyl. Also provided are their use and intermediates for their production.