A remarkable temperature effect in the desymmetrisation of bridged meso-tricyclic succinic anhydrides with chiral oxazolidin-2-ones

A temperature dependent reversal of diastereoselectivity was observed in the desymmetrisation of bridged meso-tricyclic succinic anhydrides with lithiated chiral oxazolidin-2-ones that appears to be kinetically driven at low temperature while the reversibility of the reaction sets in at higher temperatures and thermodynamics governs the reaction outcome.

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