Organocatalysis using protonated 1,2-diamino-1,2-diphenylethane for asymmetric Diels-Alder reaction

Kyoung Hoon Kim, Seil Lee, Dae Woong Lee, Dong Hyun Ko, Deok Chan Ha

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


Bisammonium salts of mono-N-alkylated chiral 1,2-diamino-1,2-diphenylethane (DPEN) were employed in the catalytic and asymmetric Diels-Alder reaction between cyclopentadiene and crotonaldehyde. The N-3-pentyl diamine·2HCl catalyst shows high endo/exo selectivity and endo-enantioselectivity for the cycloaddition, and this organocatalysis is the first example of the use of a chiral 1,2-diamine to generate an imine intermediate which is activated by an internal ammonium Brønsted acid for the cycloaddition in a wet solvent.

Original languageEnglish
Pages (from-to)5991-5994
Number of pages4
JournalTetrahedron Letters
Issue number36
Publication statusPublished - 2005 Sept 5

Bibliographical note

Funding Information:
This work was financially supported by the Center for Molecular Design and Synthesis (CMDS) at KAIST.


  • Aldehydes
  • Ammonium salts
  • Asymmetric Diels-Alder
  • Cyclopentadiene
  • Organocatalysis

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry


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