Shell Research Limited

Shell Internationale Research Maatschappij, B.v.

Lance Svend Fuller

Graham John Hutchings

Russel Andrew Stewart

Barry William Southward

Richard William Joyner

Peter R Grosvenor

A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapor phase, in the presence of a supported catalyst, the catalyst having the composition

Thiophene synthesis

A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapour phase, in the presence of a jarosite-type catalyst, having the composition

A process for the preparation of a thiophene derivative which is substituted at the beta-position by a bromine atom, which comprises reacting the corresponding beta-unsubstituted thiophene with an aromatic compound which is substituted with a bromine atom, in the presence of an alkali metal amide and a catalyst which is capable of forming a complex with the cation of the alkali metal amide.

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Acton Trussell, United Kingdom

Lance Svend Fuller