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Poli, R.; Smith, K. M., Science of Synthesis, (2003) 2, 290.
High-valent molybdenum–carbene complexes bearing electronegative ancillary ligands are efficient catalysts for alkene metathesis reactions (Scheme 8).[20,35] This reaction proceeds via [2+2] cycloaddition and formation of metallacyclobutane intermediates, some of which have been isolated under controlled conditions (see Section 2.6.5.3).[36] In order to make the reaction synthetically useful, it is necessary to have a driving force and high selectivities, and to suppress the self-metathesis if a cross-metathesis (e.g., R1 ≠ R2) is desired. The driving force may be provided by conjugation or by formation of polymeric materials. Selective processes often result from the removal of a volatile byproduct, such as ethene.
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References
| [20] | Meeee, M.; Meeeeee, M.; Meeeee, M. M., M. Meee. Mee., Meee. Meeeee., (8888), 888. |
| [35] | Meeeeee, M. M., Mee. Meee. Mee., (8888) 88, 888. |
| [36] | Meeeeee, M.; Meeee, M. M.; Meeeee, M. M.; Meeeeee, M. M., Meeeeeeeeeeeeee, (8888) 8, 8888. |
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- 8.Meeeee-Meee, (8888) M 88-8, 888.
- 8.Meeeee-Meee, (8888) M 88-8, 8888.
- 8.Meeeee-Meee, (8888) M 88-8, 888.
- 8.Meeeee-Meee, (8888) M 88-8, 888.
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