Production of fluorine compounds

US7145046B2 · kind B2 · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Max Braun · Großburgwedel, DE
• Carsten Brosch · Seelze, DE

Key dates

• Filing date: Aug 1, 2003
• Grant date: Dec 5, 2006
• Expiry date: Mar 24, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/307
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Inorganic and organic compounds containing fluorine can be produced, for example, from corresponding chlorine-containing compounds by chlorine/fluorine exchange using fluorinating agents. Monocyclic or bicyclic compounds containing at least two nitrogen atoms, at least one of which is incorporated into the ring system, can be used as catalysts or fluorinating agents for chlorine/fluorine exchange reactions to produce sulfurylchlorofluoride, sulfurylfluoride or a carboxylic acid fluoride. It is likewise possible to carry out HF addition to unsaturated carbon-carbon bonds or chlorine/fluorine exchange at carbon atoms. For example, monochloro or dichloro malonic acid esters can be converted to difluoro malonic acid esters. Work-up of the reaction mixture can be simplified by using suitable solvents which force the reaction mixture to exist in two phases.