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Zhu D, Xia L, Pan L, Li S, Chen R, Mou Y, Chen X. An asymmetric Ugi three-component reaction induced by chiral cyclic imines: synthesis of morpholin- or piperazine-keto-carboxamide derivatives. J Org Chem. 2012 Feb 03;77(3):1386–95. doi: 10.1021/jo2021967. PMID: 22224946. |