Lewis Acid Reagents: A Practical Approach by Yamamoto

By Yamamoto

A transparent and finished laboratory guide delivering step by step protocols for utilizing Lewis acid reagents to catalyze natural synthesis tactics. After an exam of the factitious application of cumbersome aluminum reagents as Lewis acid receptors, the guide covers the subsequent reagents, protocols, and procedures: Boron; Magnesium (II) and different alkali and alkaline earth metals; Zinc (II); Chiral titanium complexes for enantioselective catalysis; Tin Lewis acid; Silicon (IV); Silver and gold; Zr- and Hf-centered Lewis acid in natural synthesis; Scandium (III) and yttrium (III); Lanthanides (III); and different transition steel reagents. additionally lined are Lewis acid-assisted anionic polymerizations for synthesis of polymers with managed molecular weights. Lewis Acid Chemistry: a realistic Approach, a quantity within the Oxford useful method sequence in Chemistry will end up a convenient addition to the pro libraries of natural chemists in study and undefined.

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Stir the resulting solution at this temperature for 1 h to give methylaluminium bis(4-bromo-2,6-di-fe/t-butylphenoxide) (MABR) almost quantitatively. During this operation, nearly 2 equivalents of methane gas are evolved per 1 equiv of trimethylaluminium. 11. Cool the reaction vessel to -20°C in a dry ice/o-xylene bath. o-Xylene is recommended as refrigerant in place of carbon tetrachloride (toxic and cancer suspecting agent). 12. Transfer frans-stilbene oxide, which is dissolved in 25 mL of dry dichloromethane, to the dropping funnel, and added to the reaction flask over 15-20 min at -20°C.

15. Wilke, G. In: Coordination Polymerization (ed. J. C. W. Chien). Academic Press, New York, 1975. 16. Strarowieyski, K. ; Skowronska-Ptasinska, M. J. Organometal. Chem. 1975, 90, C43. 17. ; Yamamoto, H. J. Am. Chem. Soc. 1985,107, 4573. 18. ; Yamamoto, H. Tetrahedron Lett. 1985,26, 3853. 19. ; Yamamoto, H. /. Am. Chem. Soc. 1994, 116, 4131. 20. ; Yamamoto, H. /. Am. Chem. Soc, 1995,117, 9091. 21. Wakefield, B. J. The chemistry of organolithium compounds. Pergamon, Oxford, 1974. 22. Beswick, M.

S. Komiya). Wiley, Chichester, 1997. 14. Ziegler, K. In: OrganometalUc Chemistry (ed. H. Zeiss). Reinhold, New York, 1960, p 194. 15. Wilke, G. In: Coordination Polymerization (ed. J. C. W. Chien). Academic Press, New York, 1975. 16. Strarowieyski, K. ; Skowronska-Ptasinska, M. J. Organometal. Chem. 1975, 90, C43. 17. ; Yamamoto, H. J. Am. Chem. Soc. 1985,107, 4573. 18. ; Yamamoto, H. Tetrahedron Lett. 1985,26, 3853. 19. ; Yamamoto, H. /. Am. Chem. Soc. 1994, 116, 4131. 20. ; Yamamoto, H. /. Am.

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