Supporting multiple organometallic catalysts on poly(norbornene) for cyanide addition to α,β-unsaturated imides

Nandita Madhavan, William Sommer, Marcus Weck

Research output: Contribution to journalArticle

Abstract

A two-catalyst system comprising of salen(AlCl) and pybox(ErCl 3) complexes supported onto poly(norbornene) has been developed. As a proof of concept the activity of the two-catalyst system was gauged for the addition of cyanide to α,β-unsaturated imides which has been shown to follow a bimetallic mechanism. The activity of the supported two-catalyst system was significantly higher than catalytic systems derived from mixtures of the two catalysts. In addition, the co-polymer could be readily recovered and reused up to 3 cycles without significant loss in conversions and yields. Nevertheless, a decrease in enantioselectivity of the cyanide adduct was observed with each subsequent cycle indicating some loss in catalytic selectivity. The reported strategy opens up avenues for supporting multiple catalysts on the same polymer backbone for catalyst-based one-pot cascade reactions.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume334
Issue number1-2
DOIs
StatePublished - Jan 4 2011

Fingerprint

Imides
imides
Cyanides
cyanides
Organometallics
catalysts
Catalysts
Polymers
cycles
Enantioselectivity
polymers
adducts
2-norbornene
cascades
selectivity

Keywords

  • Aluminum
  • Bimetallic mechanism
  • ROMP
  • Salen
  • Supported catalysis

ASJC Scopus subject areas

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

Cite this

Supporting multiple organometallic catalysts on poly(norbornene) for cyanide addition to α,β-unsaturated imides. / Madhavan, Nandita; Sommer, William; Weck, Marcus.

In: Journal of Molecular Catalysis A: Chemical, Vol. 334, No. 1-2, 04.01.2011, p. 1-7.

Research output: Contribution to journalArticle

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