| 主权项 |
1. A method for preparing fluorinated carboxylic acids and their salts comprising subjecting a fluorinated alcohol of the general formula (A):
A—CH2—OH to at least one first and at least one second oxidizing agent to produce a reaction mixture that comprises a highly fluorinated carboxylic acid or their salts of the general formula (B):
A—COO−M+, wherein M+ represents a cation and wherein A in formulas (A) and (B) is the same and A represents the residue:
Rf—[O]p—CX″Y″—[O]m—CX′Y′—[O]n—CXY—wherein Rf represents a fluorinated alkyl residue which may or may not contain one or more catenary oxygen atoms, p, m and n are independently from each other either 1 or 0,X, X′, X″, Y, Y′ and Y″ are independently from each other H, F, CF3, or C2F5 wherein at least one of X and Y is F, CF3, or C2F5; or A represents the residue:
R—CFX—wherein X and R are independently selected from a hydrogen, a halogen, or an alkyl, alkenyl, cycloalkyl, or aryl residue, which may or may not contain one or more fluorine atoms and which may or may not contain one or more catenary oxygen atoms; wherein said at least one first oxidizing agent is a compound that can be converted, by action of the second oxidizing agent, into a reactive species capable of oxidizing the fluorinated alcohol; and wherein the first oxidizing agent comprises no heavy atoms or ions and is a compound containing at least one N-oxyl. |
