Abstract
The steric demand of an oxygen atom is less than that of a CH2 group in the kinetic resolution of chiral dienophiles with the enantiomerically pure dienes 1 and ent-1 (R = OCH3). This realization led to the first differentiation between enantiotopic double bonds in a Diels–Alder reaction for the spirolactone 2 and spiroether 3.
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Schedule a callMore From: Angewandte Chemie International Edition in English
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