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In this context, the impressive work developed by I. Marek and co-workers should be noted (see: Chinkov, N.; Marek, I. In New Aspects of Zirconium Containing Organic Compounds, Topics In Organomet. Chem.; Marek, I., Ed.; Springer: Berlin, 2005; 10).
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In this context, the impressive work developed by I. Marek and co-workers should be noted (see: Chinkov, N.; Marek, I. In New Aspects of Zirconium Containing Organic Compounds, Topics In Organomet. Chem.; Marek, I., Ed.; Springer: Berlin, 2005; Vol. 10).
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The structures and relative configuration were unequivocally determined by NMR experiments COSY, HMQC, HMBC, and NOESY
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The structures and relative configuration were unequivocally determined by NMR experiments (COSY, HMQC, HMBC, and NOESY).
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31
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34547938428
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It should be noted that the outcome of the intramolecular reaction of an alkene-zirconocene complex and a six-membered cyclic enol ether is different from the intermolecular version of the reaction; see ref 3b
-
It should be noted that the outcome of the intramolecular reaction of an alkene-zirconocene complex and a six-membered cyclic enol ether is different from the intermolecular version of the reaction; see ref 3b.
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32
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34547926577
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Although a Zr-alkoxide elimination reaction could be proposed on intermediate 3, this option would afford a constrained bicyclic oxazirconocene complex. For this reason, an initial Mg, Zr exchange is proposed as the most likely step. Support for this mechanism may be found in the work developed by Hoveyda et al. See ref 5g
-
Although a Zr-alkoxide elimination reaction could be proposed on intermediate 3, this option would afford a constrained bicyclic oxazirconocene complex. For this reason, an initial Mg - Zr exchange is proposed as the most likely step. Support for this mechanism may be found in the work developed by Hoveyda et al. See ref 5g.
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33
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0037019658
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Mechanistic hypotheses for isomerization sequences in zirconocene complexes have been reported. See: a
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Mechanistic hypotheses for isomerization sequences in zirconocene complexes have been reported. See: (a) Chinkov, N.; Majumdar, S.; Marek, I. J. Am Chem. Soc. 2002, 124, 10282-10283.
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34547937034
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Formation of products 7 and 8 as single diastereoisomers is surprising as it is known that benzylic organomagnesium species such as 19 are not configurationally stable.
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Formation of products 7 and 8 as single diastereoisomers is surprising as it is known that benzylic organomagnesium species such as 19 are not configurationally stable.
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