Abstract
| - The cycloaddition of nitrones and enantiomerically purecyclopropane-1,1-dicarboxylates is examined. Transfer ofoptical activity to the adduct is dictated by thermal reactionconditions and nature of cyclopropane substitution. Opticallyactive 2-substituted cyclopropane-1,1-dicarboxylates areshown to racemize under typical reaction conditions, providing evidence for a zwitterionic ring-opened intermediate.
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