There is provided a process for the isolation of a sulfonic acid salt of formula I, or a solvate thereof, from a mixture comprising: (i) the corresponding free base; and (ii) a compound of formula III. or a salt and/or solvate thereof, which process comprises providing an aqueous dispersion of the compounds of formulae II and III and a source of R
3
SO
3
−
anions and then, if necessary, adjusting the pH of the aqueous dispersion to any value from 3 to 8. There are further provided processes wherein the mixture of compounds of formulae II and III is provided by incomplete reaction, for example in the presence of base and an aqueous phase, between a compound of formula III and a compound of formula IV In such processes, the RSO
3
−
anions of the resulting salt of formula I may be derived from the compound of formula IV. Also for all of these processes, D, R
1
, R
2
and R
3
have meanings given in the description.
提供了一种从包含以下混合物中分离出公式I的
磺酸盐或其溶剂化物的过程:(i)相应的游离碱;和(ii)公式III的化合物或其盐和/或溶剂化物,该过程包括提供公式II和III化合物的
水分散体以及R3SO3-阴离子的来源,然后必要时将
水分散体的pH调整到3至8的任何值。还提供了其中公式II和III化合物的混合物是通过不完全反应提供的过程,例如在碱和
水相存在的情况下,在公式III化合物和公式IV化合物之间,其中在这些过程中,公式I的 resulting salt的RSO3-阴离子可以来自公式IV的化合物。对于所有这些过程,D,R1,R2和R3的含义如描述中所给出。