Hydroaminomethylation of Isoprene: Recycling of the Homogeneous Rhodium Catalyst in Aqueous Biphasic SystemsThe first aqueous, biphasic hydroaminomethylation of isoprene with morpholine was investigated. In addition to optimizing various reaction parameters the dependence of the n/iso selectivity of the reaction to the pH value was investigated.Furthermore, the recycling of the water-soluble homogeneous rhodium catalyst was a main emphasis of the research.

Isoprene was hydrosilylated in the absence of transition metals by using specific organic solvents as both reaction media and organocatalysts. A highly selective reaction with successful catalyst recycling could be performed by using propylene carbonate as the reaction medium.

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