Skip to main content
European Commission logo print header
Content archived on 2022-12-23

New heterocyclic materials

Exploitable results

Further development of the fundamental chemistry of 1,2,3-dithiazoles and related substances have been carried out. An exhaustive range of N-aryl- and N-alkyl imino 1,2,3-dithiazoles was synthesized. The testing for biological and agrochemical activity of these compounds was initiated. New sources of diatolmic sulphur from arylimino-1,2,3-dithiazoles bearing an o-amino group, were discovered. Good yields of diatomic sulphur adducts in various thermal conditions were achieved. New methods for the preparation of 2-cyanobenzimidazoles were elaborated and the testing of their biological and agrochemical activity was started. The structure and properties of new 1,2,4-thiadiazole-4-oxides was investigated. A stable derivative of this class was found, and its structure has been strictly confirmed by X-ray crystallography. A synthesis of 2,5-dicyano-1,3,4-dithiazole - a key intermediate for the preparation of poly(thiadiazoles) as possible organic conductors was elaborated. New reactions of disulphur dichloride with indenes have led to the formation of polychlorinated methylene indenes, fused 1,2-tlliaziIles, thiophenes, and 1,2-dithioles. The first three derivatives are discotic liquid crystals which is very unusual for such relatively simple structures. Additional to this programme, N-ethyldiisopropylamine (Hünig's base) was converted in a one-pot reaction with disulphur dichloride into a new important heterocyclic system - bis(dithiolo)thiazine. Derivatives of this class were found to undergo very clean and selective thermal extrusion of one sulphur atom only, to give access to the new pyrrole ring system which, in turn, could be extended to polyheterocyclic pyrroles by cycloaddition reactions.

Searching for OpenAIRE data...

There was an error trying to search data from OpenAIRE

No results available