Abstract: There is disclosed a process of producing a 2-iminothiazoline derivative of the general formula ?II!, characterized in that a thiourea derivative of the general formula ?I! is treated with an acid. Also disclosed are a process of producing an N-substituted N-arylcyanamide derivative of the general formula ?VI!, characterized in that an N-arylcyanamide derivative of the general formula ?IV! is reacted with an allyl halide derivative of the general formula ?V! in an aprotic polar solvent in the presence of an iodide and an alkali metal carbonate; and a process of producing an N-substituted N-arylthiourea derivative of the general formula ?VII!, characterized in that an N-substituted N-arylcyanamide derivative of the general formula ?VI! obtained as described above is further reacted with a chemical species which generates sulfide ion or hydrogensulfide ion.

Abstract: There is disclosed a process of producing a 2-iminothiazoline derivative of the general formula [II], characterized in that a thiourea derivative of the general formula [I] is treated with an acid. Also disclosed are a process of producing an N-substituted N-arylcyanamide derivative of the general formula [VI], characterized in that an N-arylcyanamide derivative of the general formula [IV] is reacted with an allyl halide derivative of the general formula [V] in an aprotic polar solvent in the presence of an iodide and an alkali metal carbonate; and a process of producing an N-substituted N-arylthiourea derivative of the general formula [VII], characterized in that an N-substituted N-arylcyanamide derivative of the general formula [VI] obtained as described above is further reacted with a chemical species which generates sulfide ion or hydrogensulfide ion.

Abstract: A process is disclosed to produce an .alpha.-hydroxyiminophenylacetonitrile of the general formula [II]: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and Z are each as defined in the specification, characterized in that a crude nitrile containing a phenylacetonitrile of the general formula [I]: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and Z are each as defined in the specification, is reacted with an alkyl nitrite in the presence of a base, after which the reaction mixture is extracted with water and then the separated aqueous layer is neutralized with an acid. According to this production process, the desired .alpha.-hydroxyiminophenylacetonitrile can be produced with high purity, in high yield and with ease by extracting the reaction mass with water and then neutralizing the separated aqueous layer with an acid.

Abstract: A process is disclosed to produce a carboxylic acid derivative of the general formula VIII!: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and L are each as defined in the specification, characterized in that a benzyl halide is reacted with a cyano compound to give a phenylacetonitrile, which is then reacted with an alkyl nitrite in the presence of a base to give an .alpha.-hydroxyiminophenylacetonitrile, which is then reacted with an alkylating agent to give an .alpha.-alkoxyiminophenylacetonitrile, which is then hydrolyzed in the presence of a base, or is hydrated and treated with an acid, followed by hydrolysis in the presence of a base, to give an .alpha.-alkoxyiminophenylacetic acid, which is then reacted with an acid halide forming agent, or is convened into a metal salt, followed by reaction with an alkylating agent, or is reacted with a lower alcohol in the presence of an acid catalyst.

Abstract: There is disclosed a process of producing an N-alkylacetamide of the general formula (III): ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3 are the same or different and are independently hydrogen, lower alkyl, lower alkoxy, lower alkenyl, halogen or trifluoromethyl; R.sup.1 and R.sup.2 are the same or different and are independently lower alkyl; and represents a chemical bond of E- or Z-configuration, or a mixture of these configurations, which includes the steps of:(a) reacting an acetonitrile of the general formula (I): ##STR2## wherein X.sup.1, X.sup.2, X.sup.3, R.sup.1 and are each as defined above, with an alkylamine of the general formula (IV):R.sup.2 --NH.sub.2 (IV)wherein R.sup.2 is as defined above, to give an N-alkylacetamidine of the general formula (II): ##STR3## wherein X.sup.1, X.sup.2, X.sup.3, R.sup.1, R.sup.2 and are each as defined above; and(b) reacting the N-alkylacetamidine (II) with a nitrite derivative in the presence of an acid.

Abstract: There is disclosed a process of producing a 2-iminothiazoline derivative of the general formula [II], characterized in that a thiourea derivative of the general formula [I] is treated with an acid. Also disclosed are a process of producing an N-substituted N-arylcyanamide derivative of the general formula [VI], characterized in that an N-arylcyanamide derivative of the general formula [IV] is reacted with an allyl halide derivative of the general formula [V] in an aprotic polar solvent in the presence of an iodide and an alkali metal carbonate; and a process of producing an N-substituted N-arylthiourea derivative of the general formula [VII], characterized in that an N-substituted N-arylcyanamide derivative of the general formula [VI] obtained as described above is further reacted with a chemical species which generates sulfide ion or hydrogensulfide ion.