You are using Science Of Synthesis as a Guest.
Please login to access the full content or check if you have access via2.11.5.3.3 Variation 3: Reactions with Organometals Containing Electropositive Metals
Please login to access the full content or check if you have access via
Negishi, E.-i.; Takahashi, T., Science of Synthesis, (2003) 2, 759.
In addition to relatively electronegative metals discussed in Section 2.11.5.3.2, relatively electropositive metals, such as lithium, magnesium, zinc, and aluminum, have also been shown to participate in transmetalation or σ-bond metathesis with zirconacycles. For example, the reaction of a zirconacyclopentane derivative, such as 181, with 2 equivalents of an alkyllithium gives a most intriguing bimetallic complex containing only one cyclopentadienyl group, e.g. 236, in which the 2,3-dialkyl-1,4-tetramethylene moiety is fluxional, thereby rendering its two halves magnetically equivalent; however, the two hexyl moieties are magnetically nonequivalent (Scheme 98).[261] Facile displacement of the cyclopentadienyl group appears to occur predominantly with organolithiums, but may also be possible with other organoalkali metals.
Meeeee 88 Meeeeeee ee e Meeeeeeeeeeeeeeeeee eeee ee Meeeeeeeeeee[888]
Mee eeeeeeee ee eeeeeeeeeeeeeeeeeee 888 eeee eeeeeeeeeeeeee eeeeeee ee eeee ee eeeeeeee. Me eeeeeeee eee (e) σ-eeee eeeeeeeeee (ee eeeeeeeeeeeeeee) eee (ee) eeeee- eee eeeeeeeeeeeeee β-eeeeeeee eeeeeeeeeee eeee 888 ee eeee 8-eeeeeeeeeeeeeeeeeee eeeeeeee 888 eee eee(η8-eeeeeeeeeeeeeeee)(η8-eeeeee)eeeeeeeee(MM) (888), eee eeeeee ee eeeee eee ee eeeeeee eeee eeeeeeeeeeeeeeeeee (Meeeee 88).[888,888] Meeeeeeeeeeee, eeee eeeeeeeeeeeeee eeeeeeee eee eeee eeeee ee ee e eeeeeeee eeee ee eee eeeeeeeee eeeeeeeeeeeeeee eeeeeeeee-eeeeeeeee eeeeeeeeeeeeeeee ee eee-8-eeee ee eeeeeeeee ee Meeeeee 8.88.8.8.[888,888] Mee eeeeeeee ee eeeeeeeeeeeeeeeeeeee, e.e. 888, eeee eeeeeeeeeee eee eeee eeee eeeee ee eeeeeee ee e eeeeeee eeeeee (Meeeee 88).[888]
Meeeee 88 Meeeeeee ee e Meeeeeeeeeeeeeeeeee eeee Meeeeeeeeeeeee Meeeeee ee Meeeeeeeeee[88,888,888,888]
Mee eeeeeeee ee eeee-eeeeeeee eeeeeeeeeeeee eeee eeeeeeeeeeeeee eeeeeeeee ee eeeeeeeee ee eeee eeee eeeeeeeee eee eeeeeeeeee. Me eee eeeeee ee e eeeeeeeeeee eeeeeeeeeeeee ee eee eeeeeeeee-eeeeeeeee eeeeeeeeeeeeeeee ee eeeeeee eeee eeeeeeeeeeeeeeee,[888] eeeeeeeeeeeeeeeeeeee 888 eeee eeee eeeee ee eeeee eeee eeeeeeeeeeeeeee eeeeeeee ee eeeeeee α-eeee eeeeeeeeee ee eeeee ee Meeeee 888. Meeeeeeee, e eeeeeeeeeee ee eeeeeeeeeeeeeeeeeeee 888, eeeee eeeee ee eeeeee eeeeeee eeeeee, eee eeeeeeeee(η8-eeeeeeeeeeeeeeee)eeeeeeeeeeeeee(MM) (888) eeee ee eee eeeeeeeeeeeeeeeee eeee eeeeeeeee. M eeeeeee σ-eeee eeeeeeeeee eeeeeeee ee 8,8-eee(η8-eeeeeeeeeeeeeeee)eeeeeeeeeeeeeeee-8-eee (888) eee eeeeeeeeeeeeeeee eeeeeeee eee eeee eeee eeeeeeee, eee eee eeeeeee eee eeee eeeee ee eeeeeeee eeeeee eeeeeeeeeeeeee.[888]
Meeeee 888 Meeeeeee ee Meeeeeeeeeeeeeeeeeee eeee Meeeeeeeeeeeeee Meeeeeee[888,888]
References
| [12] | Meeeeeeee, M.; Meee, M.; Meeee, M.; Meeeee, M.; Meeeeee, M. M.; Meeeeee, M., M. Me. Meee. Mee., (8888) 888, 8888. |
| [188] | Meeeeee, M.; Meeeeeee, M. M.; Meeeeeee, M.; Meeee, M.; Meeeeeeee, M., M. Me. Meee. Mee., (8888) 888, 8888. |
| [195] | Meeeeee, M.; Meeeeeeee, M. M.; Meeeeee, M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
| [261] | Meeeeeee, M. M.; Meeeeee, M., Meee. Meeeee. (Meeeeeeee), (8888), 888. |
| [262] | Meeeeeeee, M.; Meee, M.; Meeee, M.; Meeeee, M., 88ee Meeeeeeee ee Meeeeeeeeeeeee Meeeeeeee: Meeee, (8888), 888. |
| [263] | Meeeeeeee, M.; Meee, M.; Meeeee, M.; Meeeeee, M., MMMee Meeeeeeeeeeee Meeeeeeeee ee Meeeeeeeeeeeee Meeeeeeee, (8888), M88. |
| [264] | Meeee, M.; Mee, M.; Meeeeeeeüeee, M., Meee. Mee., (8888) 888, 888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) M 88-8, 888.
Return to Top