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Transformation of the allylic amine of monosubstituted olefins into the aryl ketimine derivatives resulted in consistent higher anti diastereofacial selectivity in the osmium-catalyzed dihydroxylation reactions, compared to the selectivities obtained from commonly used allylic amino derivatives such as N-acyl, N-Boc or N,N-dibenzyl. The anti selectivity ranged from 3:1 to 7:1 in dry THF and the best...
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