Aromatic compound acylation method
AssigneeRhodia Chimie
InventorsJacques Dubac, Hafida Gaspard, Mireille Labrouillere, André Laporterie, Jean-Roger Desmurs, Christophe Le Roux
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Abstract
A method for acylating an aromatic compound, specifically an activated or deactivated aromatic compound, is disclosed. The method is suitable for preparing aromatic ketones. The preparation of a catalyst and novel bismuth compounds is also disclosed. Said aromatic compound acylation method comprises reacting said aromatic compound with an acylating agent in the presence of a catalyst, and is characterised in that the acylation reaction is performed in the presence of an effective amount of at least one bismuth salt of trifluoromethanesulphonic acid.
Claims34
Aromatic compound acylation method comprising making an aromatic compound react with an acylation agent, in the presence of a catalyst wherein the acylation reaction is performed in the presence of an effective quantity of at least one bismuth salt of the triflic acid.
Bismuth salt of the triflic acid that corresponds to formula (IV):
- AnBi(OTf)3−n (IV)
- in said formula (IV):
- OTf represents O3SCF3,
- Ar represents a monocyclic or polycyclic aromatic carbocyclic radical,
- n is equal to 1, or 2.
Bismuth salt of the triflic acid of formula Bi(OTf)2Ph or Bi(OTf)Ph2.
Method of preparation of the tris-trifluoromethanesulfonate of bismuth comprising making a triarylbismuth and the triflic acid react at a temperature lower than 0° C.
Method of preparation of the bismuth salt of the triflic acid matching formula Arn(OTf)3−n (IV) comprising making a triarybismuth and the triflic acid react at a temperature lower than 0° C.
Dependencies are inferred from the claim text.