Process for preparing lithium, sodium, potassium, calcium and magnesium salts of fludarabine-phosphate, purification process of fludarabine-phosphate as well as fludarabine-phosphate with purity of at least 99.5 percent

摘要

In the present invention, there is disclosed a process for preparing fludarabine phosphate lithium, sodium, potassium, calcium and magnesium salts that can be used as intermediates for purification of fludarabine phosphate, and fludarabine phosphate exhibiting at least 99.5 percent purity.