Three-step synthesis of chiral and sterically hindered amino alcohols based on cyclic enol phosphates

Add time:08/19/2019    Source:sciencedirect.com

The new synthesis of chiral and sterically hindered 1,2-amino alcohols derivatives of 2-methyl-indane and 1,2,3,4-tethrahydrophenanthrene based on cyclic enol phosphates were investigated. The desired products were obtained using three step procedure: oxidation of accessible enol phosphates, transformation α-hydroxy ketones into corresponding oximes and finally reduction of the last one to 1,2-amino alcohols. The optimal conditions of all stages to obtain products with high enantioselectivity or diastereomeric ratio were found and elaborated. The structures and absolute configurations of (3R)-2,3-dihydro-3-hydroxy-1H-phenanthren-4-one and corresponding oxime were confirmed by X-ray analysis.

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