Bioorganic and Medicinal Chemistry p. 1269 - 1278 (2001)
Update date:2022-09-26
Topics:
Martin, Olivier R.
Saavedra, Oscar M.
Xie, Fang
Liu, Li
Picasso, Sylviane
Vogel, Pierre
Kizu, Haruhisa
Asano, Naoki
The homoiminosugars α- and β-homogalactonojirimycins were prepared from a common intermediate, tetra-O-benzyl-D-galacto-heptenitol 6, by way of highly stereoselective reaction sequences involving, as the key steps, an internal amidomercuration (α-epimer) and a double reductive amination (β-epimer). α-Homogalactonojirimycin retains a large part of the potent activity of the parent galactonojirimycin and 1-deoxygalactonojirimycin as an inhibitor of α-galactosidases. However, by contrast with the parent iminosugars, it does not inhibit β-galactosidases, with the exception of the Jack beans enzyme. β-Homogalactonojirimycin is a weak α-galactosidase inhibitor and is completely devoid of activity towards β-galactosidases. Thus, a marked selectivity toward one family of enzymes has been achieved by the addition of an α-CH2OH group in the structure of the parent iminosugars.
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