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Bioorganic and Medicinal Chemistry Letters 2009 Apr ; 19 (8) :2195-8
Facile synthesis of de-O-sulfated salacinols: revision of the structure of neosalacinol, a potent alpha-glucosidase inhibitor.

Facile synthesis of de-O-sulfated salacinols (3) was developed by employing the coupling reaction of an epoxide, 1,2-anhydro-3,4-di-O-benzyl-D-erythritol (9) with 2,3,5-tri-O-benzyl-1,4-dideoxy-1,4-epithio-D-arabinitol (10) as the key reaction. The reported structure of a potent alpha-glucosidase inhibitor named neosalacinol (8), isolated recently from Ayurvedic medicine Salacia oblonga, was proved incorrect, and revised to be de-O-sulfated salacinol formate (3c) by comparison of the spectroscopic properties with those of the authentic specimen synthesized. Discrepancies and confusion in the literature concerning the NMR spectroscopic properties of salacinol (1) have also been clarified.

DHARA ID: D003186 Pubmed ID: 19307117

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