Patent ID: 6881869

Claim:
A process for preparing a substituted mixed alkynyl ether from a starting mixed alkynyl ether comprising a hydrogen atom on a triple bond, said process comprising the steps of: a) reacting said starting mixed ether of the following formula (I): wherein: A with a cycle represents a non-heterocyclic, aromatic, system; R represents one or more substituent(s), identical or different, being one or more electron-donating group(s) selected from the group consisting of; linear or branched alkyl groups, linear or branched alkenyl groups, linear or branched halogenoalkyl groups, cycloalkyl groups comprising 3 to 6 carbon atoms, a phenyl group, alkoxy groups of formula R 5 —O— or thioether groups of formula R 5 —S—, wherein R 5 represents a linear or branched alkyl group comprising 1 to 6 carbon atoms, or a phenyl group, groups of formula —N—(R 6 ) 2 , wherein R 6 groups, which are identical or different, represent a hydrogen atom, a linear or branched alkyl group comprising 1 to 6 carbon atoms, or a phenyl group, and a —CF 3 group R 1 and R 2 , which are identical or different, represent a hydrogen atom, a functional group, a hydrogen group containing 1 to 24 carbon atoms, which is linear or branched, saturated or unsaturated, an acyclic, saturated or unsaturated, aliphatic group, a monocyclic, polycyclic or aromatic cycloaliphatic group, or a line or branched, saturated or unsaturated aliphatic group having a cyclic substituent, R 3 and R 4 which are identical or different, represent a hydrogen atom or a hydrocarbon group containing 1 to 12 carbon atoms, n is a number smaller than or equal to equal to 5, and x is a number from 1 to 10, with an alkylation agent, which is: a dialkylsulphate of formula (IVa): R 7 —O—SO 2 —O—R 7 (IVa) wherein R 7 represents a linear or branched group containing 1 to 6 carbon atoms, or a halide compound of formula (IVb): R 8 —X (IVb) R 8 represents a hydrocarbon group containing 1 to 20 carbon atoms, which is a linear or branched, saturated or unsaturated, acyclic aliphatic group; a saturated, unsaturated or aromatic, monocyclic or polycyclic cycloaliphatic group; or a linear or branched, saturated or unsaturated aliphatic group carrying a cyclic substituent, and X represents a brine, chlorine or iodine atom; in the presence of an anionisation agent which is an amide base, a metallic alcoholate or an alkali metal, and b) recovering said substituted mixed alkynyl ether of formula (IV): wherein A, R, R 1 , R 2 ,R 3 , R 4 , n and x have the meaning given above, and R 9 represents said R 7 or R 8 group.