Water soluble lanthanoid benzoate complexes for the kinetic separation of cis/trans-limonene oxide
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A new class of water soluble, environmentally friendly, lanthanoid 3,5-diacetamidobenzoate complexes (Ln = La, Gd, Yb) have been synthesized. The La and Gd complexes selectively catalyse hydrolysis of the cis-isomer of limonene oxide allowing for the separation of the trans-isomer (> 98:2 dr) in up to 74% yield. Comparative studies with the corresponding chlorides and triflates reveal the lanthanoid benzoate complexes to be more active than the chlorides, but less active, though more selective, than the triflates
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