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The distinctive nucleus of kainoid amino acids, (2S,3R)‐(+)‐2‐carboxypyrrolidine‐3‐acetic acid 6, was synthesized by a chemoenzymatic process, exploiting the diastereomeric cis/trans methyl pyroglutamate derivatives 10a, 10b, 10c/11a, 11b, 11c as key intermediates. These mixtures, when subjected to a kinetic resolution mediated by α‐chymotrypsin, reacted diastereo‐, regio‐, and enantioselectively...
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