Method for producing 1,1,1,5,5,5-hexafluoroacetylacetone

A method for producing a 1,1,1,5,5,5-hexafluoroacetylacetone hydrate of the general formula [3]:

• where n represents a positive integer,
• the method comprising:
• step 1:
• obtaining a reaction mixture (A) that contains at least 1,1,1,5,5,5-hexafluoro-3-pentyn-2-one or an equivalent thereof by reaction of a 3,3,3-trifluoropropynyl metal of the general formula [1] with a trifluoroacetate of the general formula [2]:
• where M represents a lithium atom or a halogenated magnesium group (MgX);
• and X represents a chlorine atom, a bromine atom or an iodine atom;
• where R represents an alkyl group;
• and
• step 2:
• forming the 1,1,1,5,5,5-hexafluoroacetylacetone hydrate of the general formula [3] by contact of the reaction mixture (A) obtained in the step 1 with water in the presence of an acid.