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HERO ID
4844654
Reference Type
Journal Article
Title
A One-Pot Tandem Olefin Isomerization/Metathesis-Coupling (ISOMET) Reaction
Author(s)
Djire, A; Ajenifujah, OT; Sleightholme, AES; Dobereiner, L; Erdogan, G; Larsen, CR; Grotjahn, DB; Schrock, RR
Year
2014
Volume
4
Issue
9
Page Numbers
3069-3076
DOI
10.1021/cs500889x
Web of Science Id
WOS:000341405600027
Abstract
A tandem catalytic reaction has been developed as part of a process to discover tungsten-based olefin metathesis catalysts that have a strong preference for terminal olefins over cis or trans internal isomers in olefin metathesis. This tandem isomerization/terminal olefin metathesis reaction (ISOMET) converts C trans internal olefins into C2N-2 cis olefins and ethylene. This reaction is made possible with Ru-based "alkene zipper" catalysts, which selectively isomerize trans olefins to an equilibrium mixture of trans and terminal olefins, plus tungsten-based metathesis catalysts that react relatively selectively with terminal olefins to give Z Ru cat W cat homocoupled products. The most effective catalysts are W(NAr)(C3H6)(pyr)(OHIPT) (Ar = 2,6-diisopropylphenyl; pyr = pyrrolide; OHIPT = 0-2,6-(2,4,6-i-Pr3C6H2)(2)C6H3) and various [CpRu(P N)(MeCN)]X (X- = [B(3,5-(CF3)(2)C6H3)4]-, PF6-, B(C6F5)(4)-) isomerization catalysts.
Keywords
tandem catalysis; olefin; metathesis; isomerization; ruthenium; tungsten
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Molybdenum
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