Abstract
The synthesis of a third generation dronic acid, zoledronic acid by the reaction of imidazol- 1-yl-acetic acid with phosphorus trichloride/phosphorous acid in diethyl carbonate (DEC) as a “green” solvent, and in DEC – methanesulfonic acid (MSA) solvent mixtures is described. The earlier not “green” and expensive MSA and sulfolane solvents may be replaced by DEC.
Keywords: Zoledronic acid, imidazol-1-yl-acetic acid, P-reagents, diethyl carbonate, methanesulfonic acid, sulfolane.
Graphical Abstract
[http://dx.doi.org/10.1002/3527608001.ch18]
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