Biological Properties of d- and l-1-Deoxyazasugars
摘要:
L-Enantiomers of 1-deoxynojirimycin (DNJ), 1-deoxymannojirimycin (manno-DNJ), 1-deoxyallonojirimycin (allo-DNJ), 1-deoxyaltronojirimycin (altro-DNJ), 1-deoxygalactonojirimycin (galacto-DNJ), 1-deoxygulonojirimycin (gulo-DNJ), and 1-deoxyldonojirimycin (ido-DNJ) were prepared according to prior methods for the D-enantiomers. These enantiospecific syntheses established unambiguously the absolute configuration of naturally occurring DNJ, manno-DNJ, allo-DNJ, altro-DNJ, and gulo-DNJ. Although D-DNJ and D-galacto-DNJ are known to be powerful competitive inhibitors of alpha-glucosidase and alpha-galactosidase, respectively, with K-i values in the nM range, L-DNJ and L-galacto-DNJ were noncompetitive inhibitors of alpha-glucosidase and alpha-galactosidase, respectively, with K-i values in the PM range. However, the azasugar mimicking the structure of the terminal sugar moiety of the natural substrate is not always an inhibitor of the glycosidase responsible for the hydrolysis. D-manno-DNJ is known as a much better inhibitor of alpha-L-fucosidase than a-mannosidase, while L-allo-DNJ was a better inhibitor than D-manno-DNJ of alpha-mannosidase. L-galacto-DNJ can be regarded as the 6-hydroxylated derivative of deoxyfuconojirimycin (DFJ), which is a powerful inhibitor of alpha-L-fucosidase with a K-i value in the nM range. However, this replacement of the methyl group in DFJ by a hydroxymethyl group reduced its affinity by about 50-fold. This suggests that there is a hydrophobic region in or around the active site of alpha-L-fucosidase. It has been found that inhibitors of human lysosomal glycosidases have therapeutic potential for the corresponding lysosomal storage diseases (Nat. Med. 1999, 5, 112; Proc. Natl. Acad. Sci. USA, 2002, 99, 15428). Inhibition of human lysosomal glycosidases by the 1-deoxyazasugars synthesized was investigated. D-galacto-DNJ is a potent inhibitor of lysosomal alpha-galactosidase (IC50 = 90 nM) and is now being evaluated preclinically for its potential use in Fabry disease, while D-DNJ inhibiting alpha-glucosidase (IC50 = 40 nM) potently does not appear to become a potential therapeutic agent because of additional inhibitory activity toward glycoprotein processing alpha-glucosidases. On the other hand, although L-allo-DNJ is a moderate inhibitor of alpha-mannosidase (IC50 = 64 mu M), it may become a key compound for the drug design of potential therapeutic agents for alpha-mannosidosis.
Diastereoselective Route to Piperidine and Indolizidine Scaffolds From Enantiopure Vinylsulfinyl-Containing Amino Alcohols
摘要:
A new route to functionalized piperidine and indolizidine scaffolds, based on the diastereoselective intramolecular Michael cyclization of vinyl-sulfinyl-containing amino alcohols 1-3, has been developed. Pyrolytic elimination of the resulting cycloadducts resulted in the regioselective formation of the corresponding tetrahydropyridines and indolizidines. The observed regiochemical course of this process can be explained mainly in terms of the steric bias imposed by the disposition of the arylsulfinyl group and the concerted syn mechanism accepted for this kind of elimination.
Chiral disubstituted piperidinyl ureas: a class of dual diacylglycerol lipase-α and ABHD6 inhibitors
作者:Hui Deng、Tom van der Wel、Richard J. B. H. N. van den Berg、Adrianus M. C. H. van den Nieuwendijk、Freek J. Janssen、Marc P. Baggelaar、Hermen S. Overkleeft、Mario van der Stelt
DOI:10.1039/c7md00029d
日期:——
Inhibitors of diacylglycerollipases and α,β-hydrolasedomaincontainingprotein6 (ABHD6) are potential leads for the development of therapeutic agents for metabolic and neurodegenerative disorders. Here, we report the enantioselective synthesis and structure activity relationships of triazole ureas featuring chiral, hydroxylated 2-benzylpiperidines as dual inhibitors of DAGLα and ABHD6. The chirality
Assessment of Partially Deoxygenated Deoxynojirimycin Derivatives as Glucosylceramide Synthase Inhibitors
作者:Richard J. B. H. N. van den Berg、Tom Wennekes、Amar Ghisaidoobe、Wilma E. Donker-Koopman、Anneke Strijland、Rolf G. Boot、Gijsbert A. van der Marel、Johannes M. F. G. Aerts、Herman S. Overkleeft
DOI:10.1021/ml200050s
日期:2011.7.14
N-butyldeoxynojirimycin (Zavesca) is thought to inhibit through mimicry of its substrate, ceramide. In this work we demonstrate that, in contrast to what is proposed in this model, the C2-hydroxyl of the deoxynojirimycin core is important for GCS inhibition. Here we show that C6-OH appears of less important, which may set guidelines for the development of GCS inhibitors that have less affinity (in comparison with
A new route to functionalized piperidine and indolizidine scaffolds, based on the diastereoselective intramolecular Michael cyclization of vinyl-sulfinyl-containing amino alcohols 1-3, has been developed. Pyrolytic elimination of the resulting cycloadducts resulted in the regioselective formation of the corresponding tetrahydropyridines and indolizidines. The observed regiochemical course of this process can be explained mainly in terms of the steric bias imposed by the disposition of the arylsulfinyl group and the concerted syn mechanism accepted for this kind of elimination.
Biological Properties of <scp>d</scp>- and <scp>l</scp>-1-Deoxyazasugars
L-Enantiomers of 1-deoxynojirimycin (DNJ), 1-deoxymannojirimycin (manno-DNJ), 1-deoxyallonojirimycin (allo-DNJ), 1-deoxyaltronojirimycin (altro-DNJ), 1-deoxygalactonojirimycin (galacto-DNJ), 1-deoxygulonojirimycin (gulo-DNJ), and 1-deoxyldonojirimycin (ido-DNJ) were prepared according to prior methods for the D-enantiomers. These enantiospecific syntheses established unambiguously the absolute configuration of naturally occurring DNJ, manno-DNJ, allo-DNJ, altro-DNJ, and gulo-DNJ. Although D-DNJ and D-galacto-DNJ are known to be powerful competitive inhibitors of alpha-glucosidase and alpha-galactosidase, respectively, with K-i values in the nM range, L-DNJ and L-galacto-DNJ were noncompetitive inhibitors of alpha-glucosidase and alpha-galactosidase, respectively, with K-i values in the PM range. However, the azasugar mimicking the structure of the terminal sugar moiety of the natural substrate is not always an inhibitor of the glycosidase responsible for the hydrolysis. D-manno-DNJ is known as a much better inhibitor of alpha-L-fucosidase than a-mannosidase, while L-allo-DNJ was a better inhibitor than D-manno-DNJ of alpha-mannosidase. L-galacto-DNJ can be regarded as the 6-hydroxylated derivative of deoxyfuconojirimycin (DFJ), which is a powerful inhibitor of alpha-L-fucosidase with a K-i value in the nM range. However, this replacement of the methyl group in DFJ by a hydroxymethyl group reduced its affinity by about 50-fold. This suggests that there is a hydrophobic region in or around the active site of alpha-L-fucosidase. It has been found that inhibitors of human lysosomal glycosidases have therapeutic potential for the corresponding lysosomal storage diseases (Nat. Med. 1999, 5, 112; Proc. Natl. Acad. Sci. USA, 2002, 99, 15428). Inhibition of human lysosomal glycosidases by the 1-deoxyazasugars synthesized was investigated. D-galacto-DNJ is a potent inhibitor of lysosomal alpha-galactosidase (IC50 = 90 nM) and is now being evaluated preclinically for its potential use in Fabry disease, while D-DNJ inhibiting alpha-glucosidase (IC50 = 40 nM) potently does not appear to become a potential therapeutic agent because of additional inhibitory activity toward glycoprotein processing alpha-glucosidases. On the other hand, although L-allo-DNJ is a moderate inhibitor of alpha-mannosidase (IC50 = 64 mu M), it may become a key compound for the drug design of potential therapeutic agents for alpha-mannosidosis.