Tetrahedron Letters p. 1029 - 1032 (1998)
Update date:2022-09-26
Topics:
Gardiner, John M.
Bruce, Sarah E.
Asymmetric dihydroxylation of the L-proline-derived 1,1-disubstituted alkene 5 catalysed by either (DHQ)2PHAL or (DHQD)2PHAL unexpectedly leads to preference for the same diastereomer 7, both reactions proceeding with apparently matching double diastereoselectivity. In contrast, AD using the analogous (DHQ)2PYR or (DHQD)2PYR ligands leads to preferences for diols 7 or 8 respectively.
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