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Abstract
The asymmetric synthesis of cis-4,5-disubstituted oxazolidin-2-ones is described. Following a four step reaction sequence of α-alkylation, 1,2-addition with subsequent carbamate protection, cyclization and concluding withcleavage of the auxiliary the title compounds are obtained in moderate yields and in excellent diastereo- and enantiomeric excesses (de = 88 - > 96%, ee > 96%).
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