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CAS number:


Patent number:


Universal catalyst which provides good results in a wide spectrum of transformations. High selectivity in cross metathesis (CM) reactions between type 1 olefins (rapid homodimerization, homodimers consumable) and an electron deficient partner, but gives lower efficiency (defined as Turnover Number, TON) than nitro-Grela-SIPr in this type of reactions. More efficient than other catalysts presented herein in reactions with sterically demanding substrates. Comparison with competing products:
– RCM: It is possible to perform the reaction at lower temperature (0 °C). Hoveyda-Grubbs II require higher temperature.
– En-yn: using nitro-Grela gives higher conversion with 2.5 times lower loading catalyst than Hoveyda-Grubbs,
– CM: nitro-Grela allows to perform reaction at lower temperature, with lower loading than Grubbs-II and Hoveyda-Grubbs II. The desired products are obtained with higher selectivity.

Chemical properties

Chemical formula: 


Molecular weight: 671.62 g/mol

Physical state: powder

Color: green

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Handling information

High stability allows catalyst handling on air.

Storage information

Long-term storage (>1 week): Store under inert gas in a cold place (recommended temp. 2 – 8 oC).

Short-term storage (<1 week): Store under inert gas at ambient temperature.


Reference list
  1. PCT/EP2003/011222
  2. K. Grela, S. Harutyunyan, A. Michrowska “A New Highly Efficient Ruthenium Catalyst for Metathesis Reaction” Angew. Chem. Int. Ed., 41, 4038 – 4040, (2002).
  3. K. Grela, A. Michrowska, M. Bieniek, M. Kim, R. Klajn “Cross-metathesis reaction of vinyl sulfones and sulfoxides” Tetrahedron, 59, 4525 – 4531, (2003).
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