Abstract
Synthesis and evaluation of four diastereomers ( 9a, 9b, 9c and 9d) of kotalanol, a potent α-glucosidase inhibitor isolated from an Ayurvedic medicinal plant Salacia species, are described. Stereo-inversion at C-3′ and C-4′ of kotalanol ( 2) caused significant decrease of the inhibitory activities against maltase and sucrase, whereas inhibitory activity against isomaltase sustained, thus resulted in exerting selectivity against isomaltase.
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