Abstract: The present invention relates to a process for the production of a biguanide derivative useful as an intermediate for triazine-type herbicides, in which the biguanide derivative can be produced at high yields by reacting a phenoxyalkylamine salt with dicyandiamide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms, or by reacting a free phenoxylakylamine with a hydrogen halide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms and reacting the resultant a phenoxyalkylamine salt with dicyandiamide in the same solvent without isolating the phenoxyalkylamine salt.

Abstract: A pyridine compound of the formula ##STR1## wherein X is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a haloalkyl group having 1 to 4 carbon atoms or a haloalkoxyl group having 1 to 4 carbon atoms, n is 1 to 5, and when n is 2 or more, Xs may be identical to or different from each other, A is an alkyl residue or alkene residue in which a portion connecting the aryl group with the 4-position of the pyridyl group has 3 to 8 carbon atoms, or an alkapolyene residue in which said portion has 4 to 8 carbon atoms and 2 to 4 double bonds; the alkyl residue, alkene residue, and alkapolyene residue may have an alkyl side chain having 1 to 4 carbon atoms, an alkylidene side chain having 1 to 4 carbon atoms or 1 to 16 halogen atoms, and when there are 2 or more side chains, the side chains may be identical to or different from each other, and R.sup.1 and R.sup.

Abstract: A process for producing a triazine derivative of the formula (III), ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.4 alkyl group, n is an integer of O to 2, R.sup.2 is hydrogen or a C.sub.1 -C.sub.2 alkyl group, and X is a halogen atom,which comprises reacting a biguanide derivative of the formula, ##STR2## wherein R.sup.1 and n are as defined in the formula (III), and X' is a halogen atom,with a halocarboxylic acid ester of the formula, ##STR3## wherein R.sup.2 and X are as defined in the formula (III), and R.sup.3 is a C.sub.1 -C.sub.4 alkyl group,in the presence of a base, wherein a dehydrating agent is present in the reaction system, and processes for producing 2-fluoroisobutyric acid ester as an intermediate compound for the production of the triazine derivative.

Abstract: A 2-fluoroisobutyric acid ester can be obtained at a high yield in one pot by reacting a 2-hydroxyisobutyric acid ester with fluorosulfuric acid in the absence or presence of a hydrogen fluoride source, or by reacting a 2-hydroxyisobutyric acid ester with chlorosulfuric acid in the presence of a hydrogen fluoride source.