It comprises a process for the preparation of levofloxacin based on a cyclisation reaction of a compound of formula (IV), which has the alcohol group protected, followed by a deprotection reaction and the conversion of the compound obtained to levofloxacin by a process comprising a hydrolysis reaction and a second cyclisation reaction. It also comprises new intermediates compounds.
本发明涉及一种基于化合物(IV)的环化反应制备
左氧氟沙星的过程,该化合物的醇基被保护,随后进行去保护反应,并通过包括
水解反应和第二个环化反应的过程将所得化合物转化为
左氧氟沙星。本发明还包括新的中间体化合物。