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New Enantiomerically Pure Alkylimido Molybdenum-Based Alkylidene Complexes . Synthesis , Characterization , and Activity as Chiral Olefin Metathesis Catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pilyugina, Tatiana S. Schrock, Richard R. Müller, Peter Hoveyda, Amir H. |
| Abstract | Molybdenum olefin metathesis catalysts that contain aliphatic 1-phenylcyclohexylimido (NPhCy) and 2-phenyl-2-adamantylimido (NPhAd) groups and ( S)-Biphen or (R)-Trip ligands (Biphen) 3,3′-di-tertbutyl-5,5′,6,6′-tetramethyl-1,1′-biphenyl-2,2′-diolate; Trip ) 3,3′-bis(2,4,6-triisopropylphenyl)-2,2 ′-binaphtholate) have been prepared. Their catalytic activity and enantioselectivity in desymmetrization reactions such as ring-closing metathesis of amines and lactams and ring-opening/cross-metathesis of substituted norborneols with styrene were compared to the results obtained with the only known alkylimido catalyst, Mo(NAd)(CHCMe2Ph)[(S)-Biphen]. The activities and enantioselectivities provided by these new chiral complexes vary significantly, but in virtually all instances explored were not superior to the adamantylimido analogues. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://web.mit.edu/pmueller/www/own_papers/pilyugina_etal_2007.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
