Abstract: The invention relates to a method for producing 2-amino-4,6-dichloro-5-formamidopyrimidine from 2,5-diamino-4,6-dihydroxypyrimidine or a salt thereof. According to said method, a) 2,5-diamino-4,6-dihydroxypyrimidine or the salt or tautomer forms thereof are reacted with a chlorination agent and a formamide of formula (I) wherein R1 and R2 independently represent a C1-C4 alkyl radical or —R1-R2— represents —(CH2)n— where n=4-6, or —(CH2)2-0-(CH2)2—, without adding a solvent, at a temperature of between 50 and 130° C., b) the reaction product obtained in step a) is reacted with water at a temperature of between 0 and 100° C., and regulated to a pH value of between 1 and 6 with an inorganic base, and c) the aqueous reaction mixture obtained in step b) is left to react at a temperature of between 70 and 120° C. under hydrolysis to form 2-amino-4,6-dichloor-5-formamidopyrimidine. The inventive method enables satisfactory yields and high levels of purity of the end product to be obtained.

Abstract: Physiological strengthening agents in the form of nutritional supplements, feed additives or in cosmetic preparations in the non-medicinal field of application, as well as plant stimulating agents is the use of guanidine compounds of the general formula (I) or their salts, especially creatinol, creatinol-O-phosphate or one of their salts with aspartic acid, ascorbic acid, succinic acid, fumaric acid, acetic acid or phosphoric acid. R1 and R2 can be organic or inorganic compounds, such as, phosphate, sulfate, acetyl, formyl, methyl, ethyl or propyl. The compounds are as nutritional supplements, for, e.g. human being in the fields of education, sports, reconvalescence or geriatrics. They can also be used use as animal feed additives.

Abstract: A description is given of the use of asymmetrically substituted urea derivatives of the general formula (I) where R1 and R2 each independently are a linear or branched aliphatic hydrocarbon radical having 1 to 4 carbon atoms as accelerators in combination with dicyandiamide as latent hardener for epoxy resin systems based on unhalogenated or halogenated bisphenols of type A or F and also based on resorcinol or tetrakisphenylolethane. The advangages of the inventively proposed accelerator/hardener combination are, for example, the excellent reactivity and very good storage stability. Moreover, the mechanical properties of the resins cured accordingly are likewise outstanding.

Abstract: The present invention provides a process for preparing 2-amino-4-chloro-6-alkoxypyrimidines by reacting the 2-amino-4,6-dichloropyrimidine with an alkali metal alkoxide or a mixture of alkali metal hydroxides and an alcohol, in which the reaction is effected in a polar aprotic solvent (or solvent mixture), the solvent is subsequently distilled off to an extent of >30% and the product is precipitated by adding water during or after the distillation. This process, in which the polar aprotic solvent used may in particular be acetone and which can be performed at temperatures between 5 and 60° C., allows 2-amino-4-chloro-6-alkoxypyrimidines and in particular 2-amino-4-chloro-6-methoxypyrimidine to be prepared in high yields and at simultaneously very marked purity in a particularly economically viable and environmentally benign manner.

Abstract: Physiological strengthening agents in the form of nutritional supplements, feed additives or in cosmetic preparations in the non-medicinal field of application, as well as plant stimulating agents is the use of guanidine compounds of the general formula (I) or their salts, especially creatinol, creatinol-O-phosphate or one of their salts with aspartic acid, ascorbic acid, succinic acid, fumaric acid, acetic acid or phosphoric acid. R1 and R2 can be organic or inorganic compounds, such as, phosphate, sulfate, acetyl, formyl, methyl, ethyl or propyl. The compounds are as nutritional supplements, for, e.g. human being in the fields of education, sports, reconvalescence or geriatrics. They can also be used use as animal feed additives.

Abstract: A process is described for preparing 3-amino-4,4,4-trifluorocrotonic esters of the formula (I) or the E/Z isomers or tautomeric forms thereof where R1 and R2 are each independently hydrogen, an optionally substituted linear C1-C4-alkyl radical or an optionally substituted benzyl radical and R3 is methyl or ethyl, which comprises a) reacting an alkyl trifluoroacetate with an alkyl acetate of the formula CH3—CO—OR3 and an alkali metal alkoxide to give an enolate of a trifluoroacetoacetic ester of the formula (II) where M is sodium or potassium and R3 is as defined above, and subsequently b) allowing the alkali metal enolate of the trifluoroacetoacetic ester from stage a) to react without further purification directly with an amine of the formula NHR1R2 in the presence of an acid to give the 3-amino-4,4,4-trifluorocrotonic ester. With the aid of this two-stage process, the 3-amino-4,4,4-trifluorocrotonic esters can be prepared in high yields without significant by-products.

Abstract: A process is described for preparing 4-methylpyrimidine by reacting a 4,4-dialkoxy-2-butanone with a formamidine salt, optionally in the presence of a solvent or diluent, at temperatures of from 80 to 180° C. In this way, 4-methylpyrimidine can be obtained in a substantially simpler manner and at the same time in higher yields than are possible by means of existing processes.

Abstract: A curing agent for the production of low gloss powder coatings based on epoxy resins consists essentially of a mixture of the components a) 2-imidazoline derivative having a melting point of >60.degree. C. and b) cyanuric acid as well as, if desired, anticaking agents or/and stabilizers. The low gloss powder coatings produced with these curing agents have the desired low degrees of gloss and good adhesive strengths, they form smooth and uniform surfaces and show no signs of yellowing even after long stoving times.