EP 0639188 A1 19950222 - PROCESS FOR PREPARING THIOPHENE AND ITS DERIVATIVES.
Title (en)
PROCESS FOR PREPARING THIOPHENE AND ITS DERIVATIVES.
Title (de)
VERFAHREN ZUR HERSTELLUNG VON THIOPHEN UND SEINEN DERIVATEN.
Title (fr)
PROCEDE D'ELABORATION DU THIOPHENE ET DE SES DERIVES.
Publication
Application
Priority
- FI 9200046 W 19920220
- FI 910823 A 19910220
Abstract (en)
[origin: WO9214724A1] In the process according to the invention for the preparation of thiophene and particularly a thiophene, the non-sulphur bound carbon of which is substituted, the product is produced by treating succinic anhydride or especially substituted succinic anhydride with a sulphur compound. The sulphur compound is preferably a sulphur compound, which contains phosphorus, such as phosphorus pentasulphide. The stated treatment with a sulphur compound forms according to one embodiment the end stage of the process, in which 1-alkene is attached to maleic anhydride to give an 1-alkenyl-succinic anhydride, the 1-alkenylsuccinic anhydride is hydrogenated catalytically to produce an alkylsuccinic anhydride and the alkylsuccinic anhydride is treated with the above-mentioned sulphur compound to give a thiophene, the non-sulphur bound carbon of which, e.g. 3-carbon, is substituted.
IPC 1-7
IPC 8 full level
C07D 333/08 (2006.01)
CPC (source: EP)
C07D 333/08 (2013.01)
Citation (search report)
See references of WO 9214724A1
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
WO 9214724 A1 19920903; EP 0639188 A1 19950222; FI 910823 A0 19910220; FI 910823 A 19920821
DOCDB simple family (application)
FI 9200046 W 19920220; EP 92905350 A 19920220; FI 910823 A 19910220