C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 229/12 (2006.01) C07C 227/08 (2006.01) C07C 227/26 (2006.01) C07D 273/01 (2006.01) C07D 295/15 (2006.01)
Patent
CA 2157096
Disclosed is a process for the preparation of quaternary diesters of the formula: Image X- , wherein X- represents a halogen atom, notably a chlorine atom or a bromine atom, R1 and R2 may be the same or different and have the meaning of an alkyl group having 1 to 3 carbon atoms, a hydroxyethyl group, or be linked together to form an alkylene group having 4 to 6 carbon atoms which may be interrupted by an N atom or O atom, and R3 and R4 may be the same or different and have the meaning of an alkyl group or alkenyl group having 8 to 22 carbon atoms, or be linked together to form an alk(en)ylene group having 8 to 22 carbon atoms, characterised in that a) a secondary amine of the formula R1-NH-R2 is gradually added to and converted with one or more liquid compounds of the formula Image and/or Image at a molar ratio in the range of 1,0 : 1,0 and 1,0 : 1,2, after which b) the formed solid amine hydrohalide is separated, followed by c) an aftertreatment, optionally in a solvent, at elevated tem- perature until the conversion is virtually complete, after which, if so desired, further treatments, such as recrystallisation from an organic solvent, are carried out to achieve a special product form.
Fischer Andrea Gertrud
Weissen Hans Joachim
Weuste Burkhard
Akzo Nobel Nv
Swabey Ogilvy Renault
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