Processes for making zoledronic acid can be advantageously carried out in a solvent/diluent that comprises a mixture of (i) a polyalkylene glycol and (ii) a cyclic carbonate of the formula (3)
wherein n is an integer from 2 to 4, and R
1
and R
2
each independently represent a hydrogen or a C1-C4 alkyl group.
制备左氧
磷酸的过程可以有利地在包含以下混合物的溶剂/稀释剂中进行:(i) 聚烷基二醇和(ii) 公式(3)中的环
碳酸酯的混合物,其中n是2到4之间的整数,R1和R2各自独立表示氢或C1-C4烷基基团。