Process for the preparation of 4-fluoro-4-R-5-R'-1,3-dioxolane-2-ones
AssigneeSolvay Fluor GmbH
InventorsMartin Bomkamp, Jens Olschimke, Carsten Brosch, Andreas Grossmann
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Abstract
The present invention concerns 4-fluoro-4-R-5-R′-1,3-dioxolane-2-ones, wherein R is an alkyl group and R′ is H or a C1 to C3 alkyl group, their manufacture, solvent mixtures for lithium ion batteries containing them and conductive salt solutions for lithium ion batteries, e.g. solutions containing LiPF6.
Claims16
A compound of formula (I), 4-fluoro-4-R-5-R′-1,3-dioxolane-2-one wherein R is an alkyl group and R′ is H or a C1 to C3 alkyl group.
A process for the preparation of 4-fluoro-4-R-5-R′-1,3-dioxolane-2-one wherein R is an alkyl group and R′ is H or a C1 to C3 alkyl group, said process comprising a step of cyclization of compounds of formula (II):
- FC(O)OCHR′C(O)R wherein R is alkyl and R′ is H or a C1 to C3 alkyl group, or comprising a step of cyclization of compounds of formula (II′):
- ClC(O)OCHR′C(O)R wherein R is alkyl and R′ is H or a C1 to C3 alkyl group and a step of subsequent chlorine-fluorine exchange.
A compound of formula (II):
- FC(O)OCHR′C(O)R wherein R is an alkyl group, and R′ is H or a C1 to C3 alkyl group.
A solvent mixture for lithium ion batteries, containing at least one 4-fluoro-4-R-5-R′-1,3-dioxolane-2-one wherein R is an alkyl group and R′ is H or a C1 to C3 alkyl group, and at least one other solvent suitable for lithium ion batteries.
An electrolyte solution for lithium ion batteries containing the solvent mixture of claim 13 and a lithium ion battery conductive salt.
A compound of formula (IV):
- 4-chloro-4-R-5-R′-1,3-dioxolane-2-one wherein R is an alkyl group and R′ is H.
Dependencies are inferred from the claim text.