Abstract: Quinoxaline derivatives having the formula I wherein X represents a halogen atom; R represents —COR1, —CH═CH—COOR2(R2 represents a C1-C4 alkyl group); —CN or —CH2OH, and R1 represents —S—R3 (R3 represents a C1-C4 alkyl or alkenyl group or phenyl or chlorophenyl group), —NH—R4 (R4 represents a C1-C4 alkoxy carbonylalkyl group, hydroxy alkyl group, phenyl group, C1-C4 alkoxy alkyl group or di C1-C4 alkyl amino group) are remarkably effective as selective herbicides.

Abstract: Quinoxaline derivatives having the formula I ##STR1## wherein X represents a halogen atom; R represents ##STR2## --CH.dbd.CH--COOR.sup.2 (R.sup.2 represents a C.sub.1 -C.sub.4 alkyl group); --CN or --CH.sub.2 OH, and R.sup.1 represents ##STR3## --S--R.sup.3 (R.sup.3 represents a C.sub.1 -C.sub.4 alkyl or alkenyl group or phenyl or chlorophenyl group), --NH--R.sup.4 (R.sup.4 represents a C.sub.1 -C.sub.4 alkoxy carbonylalkyl group, hydroxy alkyl group, phenyl group; C.sub.1 -C.sub.4 alkoxy alkyl group or di C.sub.1 -C.sub.4 alkyl amino group), are remarkably effective as selective herbicides.

Abstract: A herbicidal composition which comprises an adjuvant and an active ingredient of heterocyclic ether type phenoxy fatty acid derivative having the formula ##STR1## wherein A represents --CH-- or --N--; X represents a halogen atom; n is 0, 1 or 2; R.sup.1 represents a hydrogen atom; a lower alkyl group; R.sup.2 represents --OH; --O-alkyl group; --OM group (M is an inorganic or organic salt moiety); ##STR2## --O-lower alkenyl group; --O-benzyl group; --O-lower alkylalkoxy group; --O-phenyl; --O-cyclohexyl, --O-halogenoalkyl, --O-lower alkynyl and --O-cyanoalkyl; R.sup.3 and R.sup.4 respectively represent a hydrogen atom or a lower alkyl group.

Abstract: An aniline derivative represented by the formula (I): ##STR1## wherein A denotes CH or nitrogen atom; B denotes oxygen atom or sulfur atom; X.sup.1 and X.sup.2, independently of each other, denote hydrogen atom, halogen atom, trifluoromethyl group or nitro group; Y and Z, independently of each other, denote hydrogen atom or halogen atom, and a process for producing the same.

Abstract: In a process for producing phenylphosphonothioic dichloride by reacting benzene with thiophosphoryl trichloride, an improvement is characterized in that the reaction is conducted in the presence of a catalyst selected from the group consisting of Al, AlCl.sub.3, a combination of AlCl.sub.3, P.sub.2 S.sub.5 and PCl.sub.3, a combination of AlCl.sub.3 and P.sub.2 S.sub.5, and a combination of AlCl.sub.3 and PCl.sub.3, under the self-generated pressure of hydrogen chloride gas.