Mechanistic insights into perfluoroaryl borane-catalyzed allylstannations: Toward asymmetric induction with chiral boranes

Verfasser / Beitragende:
[D. J. Morrison, J. M. Blackwell, W. E. Piers]
Ort, Verlag, Jahr:
2004
Enthalten in:
Pure and Applied Chemistry, 76/3(2004-01-01), 615-623
Format:
Artikel (online)
ID: 378923005
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245 0 0 |a Mechanistic insights into perfluoroaryl borane-catalyzed allylstannations: Toward asymmetric induction with chiral boranes  |h [Elektronische Daten]  |c [D. J. Morrison, J. M. Blackwell, W. E. Piers] 
520 3 |a The perfluoroaryl borane B(C6F5)3 is an effective catalyst for a variety of organic transformations. In the hydrosilation of carbonyl functions, it activates the silane rather than the carbonyl substrate. In allylstannation reactions, two competing reaction pathways are observed, one involving tin cation catalysis, the other "true" borane catalysis. For B(C6F5)3, the former mechanism dominates, while for the weaker Lewis acid PhB(C6F5)2, the latter pathway is more prominent. Thus, chiral boranes of similar Lewis acid strength to PhB(C6F5)2 have the potential to mediate asymmetric allylstannation of aldehyde substrates. 
540 |a © 2013 Walter de Gruyter GmbH, Berlin/Boston 
700 1 |a Morrison  |D D. J.  |u Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada  |4 aut 
700 1 |a Blackwell  |D J. M.  |u Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada  |4 aut 
700 1 |a Piers  |D W. E.  |u Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada  |4 aut 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Blackwell  |D J. M.  |u Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Piers  |D W. E.  |u Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada  |4 aut 
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