Patent ID: 6881869
Filing Date: 2005-04-19
Classification: C07C

Abstract:
1. 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 groups of formula —N—(R a —CF R R 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): wherein R 7 represents a linear or branched group containing 1 to 6 carbon atoms, or a halide compound of formula (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.