Abstract: Process for the preparation of substituted thiazolines of the formula (I) in which Ar is a phenyl, naphthyl, thienyl, pyridyl or quinolinyl radical which can optionally be substituted by one or more substituents from the group consisting of halogen, OH, benzyloxy, C1-C4-alkyl, C1-C4-alkoxy, COOR1 where R1 is H or C1-C4-alkyl, by coupling of (S)-?-methylcysteine hydrochloride of the formula (II) with a nitrile of the formula (III) Ar—CN in which Ar is as defined above, or a corresponding C1-C4-alkyl imidate, in which (S)-?-methylcysteine hydrochloride of the formula (II) is reacted in a suitable solvent with a nitrile of the formula (III) or a corresponding C1-C4-alkyl imidate in the presence of a tertiary base at a pH of 6.5 to 10 at 50° C. up to the reflux temperature to give the corresponding thiazoline of the formula (I), and processes for the preparation of (S)-?-methylcysteine hydrochloride and its use for the preparation of thiazolines of the formula (I).

Abstract: Process for the preparation of substituted thiazolines of the formula (I) in which Ar is a phenyl, naphthyl, thienyl, pyridyl or quinolinyl radical which can optionally be substituted by one or more substituents from the group consisting of halogen, OH, benzyloxy, C1-C4-alkyl, C1-C4-alkoxy, COOR1 where R1 is H or C1-C4-alkyl, by coupling of (S)-?-methylcysteine hydrochloride of the formula (II) with a nitrile of the formula (III) Ar—CN in which Ar is as defined above, or a corresponding C1-C4-alkyl imidate, in which (S)-?-methylcysteine hydrochloride of the formula (II) is reacted in a suitable solvent with a nitrile of the formula (III) or a corresponding C1-C4-alkyl imidate in the presence of a tertiary base at a pH of 6.5 to 10 at 50° C. up to the reflux temperature to give the corresponding thiazoline of the formula (I), and processes for the preparation of (S)-?-methylcysteine hydrochloride and its use for the preparation of thiazolines of the formula (I).

Abstract: The invention relates to a method for producing optionally substituted aliphatic, aromatic or heteraromatic aldehydes of formula (I), whereby the R represents a C1-C20 Alkyl radical, an aromatic or heteraromatic radical Ar which can optionally be substituted once or on a number of occasions by OH, C1-C6 alkyl, C1-C6 alkoxy, C1-C6 carboxylic acids or ester containing 1-6 C atoms in the ester part, phenyl, halogen, SO3H, NO2, NR1R2 or SR1 whereby R1 and R2 can be independently H, phenyl or C1-C6 alkyl. The invention is characterised by a compound of formula (II) wherein R has the above meaning, a) is diazotized in an acidic medium, at a temperature of between −10 −+100 ° C. by a diazoation reagent and is transformed into the corresponding hydroxy carboxy acid whereby b) is transformed, by means of oxygen, into the appropriate aldehyde of formula (I) in the presence of a metal, the salt thereof, oxide or hydroxide as a catalyst.

Abstract: Process for the preparation of substituted thiazolines of the formula (I) 1

Abstract: A method for the production of substituted aromatic aldehydes or ketones and optionally substituted heteroaromatic aldehydes or ketones of formula (I) by reacting a compound of formula (II) in a suitable solvent in the presence of a carbonyl compound of formula (III), optionally in the presence of oxygen at a normal pressure or high temperature and at temperatures of 5-200° C.

Abstract: Process for the preparation of pure 4,6-dichloropyrimidine by reaction of 4,6-dihydroxypyrimidine with an excess of phosphorus oxychloride at 20.degree. C. up to reflux temperature, in the presence of a trialkylamine as acid scavenger and catalyst.

Abstract: Novel spirocyclic boron compounds of the formula ##STR1## in which R.sub.1 and R.sub.2 are various halogen containing organic :radicals and Z.sup.+ is a hydrogen ion, an equivalent of an alkaline-earth metal ion, a guanidinium ion or alkylammonium ion as flame retarding agents in various plastics, such as polyurethanes, epoxide resins and polyesters.