| 摘要 |
A di-clavulanate salt derived from clavulanic acid and a diamino ether of formula (I), where R1 is an alkylene group, optionally having one or more inert substituents; and each of R2 and R3 is a hydrogen atom or an alkyl group, optionally having one or more inert substituents, or R2 and R3 together complete a heterocyclic ring having 4 to 7 carbon atoms, again optionally having one or more inert substituents. The salt is prepared by reacting a bis(2-dialkylaminoalkylene)ether (or a salt thereof) with clavulanic acid in an organic solvent and isolating the resulting salt. The clavulanic acid salt can be used in pharmaceutical formulations together with a pharmaceutically acceptable carrier, and, optionally, a beta-lactam antibiotic, and is useful as an intermediate for the potassium salt.
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