| abstract |
A process is disclosed for producing compounds having formula (I), in which n = 1, 2 or 3, by reaction of compounds having formula (V), in which R?12 is a hydrogen or deuterium atom, with equimolar amounts of a base in water or an organic solvent, or in a mixture of water with one or several organic solvents, at a temperature in a range between the setting and boiling points of the reaction solution. A?(+) is a NH4??(+) or a NH3?D?(+) group, a metal M?(+), preferably an alkali or alkaline earth metal, or a primary, secondary, tertiary or quaternary ammonium ion having formula (II), or a residue having formula (III). |