Chemie Linz Aktiengesellschaft

Dsm Fine Chemicals Austria Nfg Gmbh & Co. Kg

Dsm Chemie Linz Gmbh

Ferdinand Heu

Gerhard Steinbauer

Gerald Saischek

Karlheinz Wegleitner

Sylvia Krich

Franz Thomas Schwarz

Wolfgang Huber

Alexander Rieder

Roman Wohlmuth

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, C-C-alkyl, C-C-alkoxy, COORwhere Ris H or C-C-alkyl,by coupling of (S)-&#x3b1;-methylcysteine hydrochloride of the formula (II)with a nitrile of the formula (III)Ar&#x2014;CNin which Ar is as defined above, or a corresponding C-C-alkyl imidate, in which (S)-&#x3b1;-methylcysteine hydrochloride of the formula (II) is reacted in a suitable solvent with a nitrile of the formula (III) or a corresponding C-C-alkyl imidate in the presence of a tertiary base at a pH of 6.5 to 10 at 50&#xb0; C. up to the reflux temperature to give the corresponding thiazoline of the formula (I), and processes for the preparation of (S)-&#x3b1;-methylcysteine hydrochloride and its use for the preparation of thiazolines of the formula (I).

Process for the preparation of substituted thiazolines and their intermediates

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.

Process for the preparation of pure 4,6-dihloropyrimidine

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.

Spirocyclic boron compounds, a process for their manufacture and their

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Ferdinand Heu