In the field of asymmetric synthesis, oxazolopiperidone lactams are undoubtedly excellent scaffolds for the synthesis of piperidine-containing bioactive compounds. Access to these lactams is readily available in a single synthetic step by cyclocondensation reaction of a delta-keto ester with an enantiopure aminoalcohol, usually (R)-phenylglycinol. Because of their versatile functionality and conformational rigidity, it is possible to introduce substituents at different positions of the piperidine ring in a regio- and stereocontrolled manner.
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