The eastern and western diaryl ether portions of the macrocyclic bastadins, natural products from the marine sponge Ianthella sp., have been assembled as [CpRu]+ complexes. In an HPLC study, aminopropyl-functionalised silica was found as a very suitable stationary phase for the chromatographic separation of the different cationic ruthenium sandwich complexes. It is now possible for the first time to effectively monitor and purify [CpRu]+ complexes and to carry them through several synthetic steps.
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Leone‐Stumpf et al. (2001) studied this question.
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