Organocatalytic enantioselective β-functionalization of aldehydes by oxidation of enamines and their application in cascade reactions

Shi Lei Zhang, He Xin Xie, Jin Zhu, Hao Li, Xin Shuai Zhang, Jian Li, Wei Wang

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

Iminium catalysis, involving the transformation of iminium ions to enamines, has been extensively studied in the context of a number of organic processes. However, the reverse of this process involving conversion of enamines to iminium species has not been realized. Here, we describe a new transformation-'oxidative enamine catalysis'-in which direct oxidation of an enamine occurs to generate an iminium species. We show that the use of o-iodoxybenzoic acid as an oxidant in the presence of a secondary amine catalyst serves as effective system for promoting rapid conversion of enamines to iminium ions. The preparative power of this process has been demonstrated in the context of direct asymmetric β-functionalization of simple aldehydes. Moreover, a variety of enantioselective cascade transformations, including triple and quadruple cascades, have been developed for the 'one-pot' synthesis of versatile chiral building blocks and structural frameworks starting with simple aldehydes.

Original languageEnglish (US)
Article number211
JournalNature communications
Volume2
Issue number1
DOIs
StatePublished - 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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