Enhanced activity of enantioselective (salen)Mn(III) epoxidation catalysts through supramolecular complexation

Gregory A. Morris, Son Binh T. Nguyen, Joseph T. Hupp

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

(Salen)Mn(III) catalysts show increased turnover numbers in the catalytic asymmetric epoxidation of conjugated olefins upon addition of bulky Lewis acids (LA) such as zinc tetraphenylporphyrin (ZnTPP). Up to 3-fold increase in total catalytic activity and at least a 20-fold increase in catalyst stability was observed with a (salen)Mn catalyst bearing pendant 5,5′-bis-pyridyl groups. This latter enhancement is primarily attributed to formation of a coordination triad, which provides steric protection for the catalyst from bimolecular decomposition. Supramolecular complex formation enhanced the catalyst's stability without compromising its enantioselectivity.

Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume174
Issue number1-2
DOIs
Publication statusPublished - Oct 1 2001

Keywords

  • Asymmetric epoxidation
  • Catalytic epoxidation
  • Manganese
  • Salen
  • Supramolecular chemistry

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Enhanced activity of enantioselective (salen)Mn(III) epoxidation catalysts through supramolecular complexation'. Together they form a unique fingerprint.

  • Cite this