Abstract: A process as represented by reaction scheme: which permits industrial mass production of &Dgr;2-1,2,4-oxadiazoline derivatives having excellent insecticidal effects or salts thereof in high yield with advantage, [wherein X1 is halogeno; R1 is optionally substituted alkyl, optionally substituted acyl, or ClCO; R2 is (1) halogeno, (2) C1-6 haloalkyl, (3) C1-6 haloalkoxy, or (4) phenyl optionally substituted with C1-6 haloalkyl; A is nitrogen or ═CR3— (wherein R3 is Cl or CN); R4 is C1-6 alkyl or C1-6 haloalkyl; n is 0, 1 or 2; and X2 is halogeno].

Abstract: A compound of the formula: wherein Ar is an optionally substituted aromatic hydrocarbon or aromatic heterocyclic group, R is H, halogen or a group bonded through C, N, O, S or P, W is halogen or a group bonded through C, N, O, S or P, X is H or a group bonded through C, N, O or S, Y is H or a group bonded through C, N, O, S or P, or X and Y together with the adjacent nitrogen atom to Y may form an optionally substituted nitrogen-containing heterocyclic group which may further have N, O, S and/or P, or a salt thereof, a method of production thereof and agrochemicals containing the above compound [I]. The compound [I] and their salts are effective in preventing sanitary or horticultural insect pests and animal and plant parasites and can exert potent insecticidal activities when they are applied to harmed living animals or plants.

Abstract: The present invention relates to a compound of the formula [I]: wherein R1 is C1-6 alkyl or C1-6 haloalkyl; n is 0, 1 or 2; X is (1) group of —NR2R3 wherein R2 and R3 independently represent (i) hydrogen or (ii) C1-6 alkyl which may optionally be substituted with pyridyl, (2) group of —N═CHOR4 wherein R4 represents C1-6 alkyl, (3) group of —N═CHNR6R7 wherein R6 and R7 independently represent (i) hydrogen or (ii) C1-6 alkyl, (4) group of —N═CHAr wherein Ar represents phenyl which may optionally be substituted with substituents selected from the group consisting of hydroxy and C1-3 alkoxy, or (5) pyrrolyl; R5 is optionally substituted alkyl or optionally substituted acyl; R8 is (1) halogen, (2) C1-6 haloalkyl, (3) C1-6 haloalkoxy or (4) phenyl which may optionally be substituted with C1-6 haloalkyl; A is (1) nitrogen atom or (2) group of wherein R9 is chlorine atom or cyano; and B is nitrogen atom or or a sa

Abstract: Novel Intermediates ##STR1## wherein R is a substituted or unsubstituted hydrocarbon residue or acyl group; X is an electron withdrawing group; Y.sup.1 and Y.sup.2, which are the same or different, are each independently oxygen or sulfur; and A is a substituted or unsubstituted, divalent hydrocarbon residue have potent reactivity, this being useful in preparing guanidine derivatives.

Abstract: Novel substituted nitroguanidine derivatives and salts thereof having the following formula: ##STR1## wherein R.sup.1 is a substituted or unsubstituted heterocyclic group; R.sup.2 is a group attached through a sulfur atom, a group attached through a phosphorus atom, cyano, --CO--OR.sup.6 wherein R.sup.6 is a substituted or unsubstituted hydrocarbon group or a substituted or unsubstituted heterocyclic group, or --CO--NR.sup.7 R.sup.8 wherein R.sup.7 and R.sup.8, which are the same or different, are each independently hydrogen, a substituted or unsubstituted hydrocarbon group or a substituted or unsubstituted heterocyclic group, or R.sup.7 and R.sup.8, taken together with the nitrogen atom to which they are attached are a cyclic amino group; R.sup.3 is hydrogen, a substituted or unsubstituted hydrocarbon group (except for one substituted with an oxo group at the binding site), a group attached through a sulfur atom, a group attached through a phosphorus atom, cyano, --CO--R.sup.9 wherein R.sup.

Abstract: This invention relates to a compound of the formula: ##STR1## wherein R.sup.1 is hydrogen, a halogen or a lower alkyl group; R.sup.2 and R.sup.33 independently are a lower alkoxyl group; and Py is an optionally substituted pyridyl group or a salt thereof.The compound or a salt thereof exerts excellent fungicidal effects against plant disease and is used as fungicide for agricultural use.