Practical asymmetric access to carboxy-differentiated aspartate derivatives via 1,3-dipolar cycloaddition of a nitrone with (R)-4-ethyl-N-vinyloxazolidin-2-one |
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| Authors: | Thanh Binh Nguyen Thi Minh Ha Vuong Arnaud Martel Robert Dhal Gilles Dujardin |
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| Institution: | aUCO2M UMR 6011 CNRS, Université du Maine, F-72085 Le Mans, France |
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| Abstract: | A new practical approach to enantioenriched carboxy-differentiated aspartate derivatives was achieved in three steps via the 1,3-dipolar cycloaddition of N-benzyl-α-carbonyloxyethylnitrone with (R)-4-ethyl-N-vinyloxazolidin-2-one and chemoselective nucleophilic displacement of aspartimide under appropriate conditions (racemization less than 3%). |
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