Synthesis and Evaluation of Aminocyclopentitol Inhibitors of β-Glucosidases
摘要:
[GRAPHICS](1R,2S,3S,4R,5R)-4-Amino-5-(hydroxymethyl)cyclopentane-1,2,3-triol 1, prepared from D-glucose, inhibits beta-glucosidases from Caldocellum saccharolyticum (K-i = 1.8 x 10(-7) M) and from almonds (K-i = 3.4 x 10(-6) M). Inhibition is not influenced by N-ethylation (--> 15) but is strongly reduced upon N-acetylation (--> 12). Inversion of stereochemistry at C(5) (--> 14) has little effect on inhibition of beta-glucosidases. These experiments suggest that 1 acts as an analogue of a protonated beta-glucoside.
substituents as aglycon mimics on the amine function were prepared and tested for inhibition of various glycosidases. N-benzyl-beta-D-gluco derivatives 1-4 and N-benzyl-beta-D-galacto derivative 5 inhibited beta-galactosidase and beta-glucosidase. N-benzyl-alpha-D-galacto aminocyclopentitol 6 strongly inhibited alpha-galactosidase. The inhibitory activities observed were generally stronger compared to those