Metalations with group 4 alkylmetal(IV) halides: Expeditious route to metallocene and nonmetallocene procatalysts

Organometallics

Volumn 20, Issue 20, 2001, Pages 4132-4134

  Eisch, John J ^a   Owuor, Fredrick A ^a   Otieno, Peter O ^a  

^a BINGHAMTON UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALKYLMETAL HALIDES; BRONSTED ACIDS; BUTYLLITHIUM; METALATIONS; METALLOCENE PROCATALYSTS; NONMETALLOCENE PROCATALYSTS;

CATALYSTS; HYDROCARBONS; LITHIUM COMPOUNDS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OLEFINS; ORGANOMETALLICS; POLYMERIZATION; TOLUENE;

TRANSITION METAL COMPOUNDS;

EID: 0035497175     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om0104621     Document Type: Article

References (23)

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8. 2.
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10. 2 and the 1,2-dibromobutane identified by NMR spectroscopy.
11. t bond to the organic substrate via a six-membered ring complex of 1 with the substrate. Which mechanism prevails remains to be determined.
12. t bond.
13. 2.
14. 2, the yield of 12 dropped markedly, most likely because of the known cationic polymerization of indenes by Lewis acids: Sigwalt, P. J. Polym. Sci. 1961, 52, 15.
15. 3): 6.87 (4H); 6.05 (4H); 3.22 (4H).
16. 13C peaks at δ 79.1, 128.5, 128.7, 129.0, and 129.3.
17. Heteroatom-tethered constrained-geometry catalysts are covered in the following Dow European patent application: Stevens, J. C.; Timmers, F. C.; Wilson, D. R.; Schmidt, G. F.; Nickias, P. N.; Rosen, R. K.; Knight, G. W.; Lai, S. Eur. Patent EP-416-815-A2, March 13, 1991.
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22. 4 dissolved in 80 mL of THF, which at -78 °C under argon is treated with 40 mmol of n-butyllithium in 25 mL of hexane.
23. 2 with 2 equiv of the requisite alcohol, ROH.