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The reaction of the title compounds and the transformations of the product, 3 were investigated with an emphasis on the stereochemistry. The primary interaction of the title compounds is feebly stereoselective. The diastereoisomers of product 3 exhibit free energies differing by ca. 16 kJ/mol; diastereoisomerization by helix inversion takes place during the reaction. The most stable diastereoisomers...
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