Process for the preparation of basic antibiotic inorganic acid addition salts and oxalate intermediate

摘要

A production process which comprises subjecting a basic antibiotic.oxalate (II) to salt-exchange with an alkali earth metal salt (III) of an inorganic acid:wherein the ring A means the basic antibiotic; R<10 >means a protected functional group used in organic synthesis; Ak-E means the alkali earth metal; and B means the inorganic acid, respectively.