13042-55-2Relevant articles and documents
Synthesis of 1,5-dideoxy-1,5-imino-D-arabinitol (5-nor-L-fuco-1-deoxynojirimycin) and its application for the affinity purification and characterisation of α-L-fucosidase
Legler, Guenter,Stuetz, Arnold E.,Immich, Hermann
, p. 17 - 30 (1995)
The title, 1,5-dideoxy-1,5-imino-D-arabinitol (2), was synthesized in seven steps from D-arabinose with 5-azido-5-deoxy-D-arabinofuranose as key intermediate and 40percent overall yield.An affinity procedure employing the N-carboxypentyl derivative of 2 l
Deoxyiminoalditols from aldonolactones - V. Preparation of the four stereoisomers of 1,5-dideoxy-1,5-iminopentitols. Evaluation of these iminopentitols and three 1,5-dideoxy-1,5-iminoheptitols as glycosidase inhibitors
Godskesen, Michael,Lundt, Inge,Madsen, Robert,Winchester, Bryan
, p. 1857 - 1865 (1996)
The four stereoisomeric 1,5-dideoxy-1,5-iminopentitols with D-arabino - (D-lyxo-) (3), ribo- (9), L-lyxo- (L-arabino-) (13) and xylo- (18) configurations were synthesized. The corresponding aldonolactones (1, 7 and 11) or aldonic acid ester (15b) having a leaving group at C-5 gave by reaction with aqueous ammonia, the 5-amino-5-deoxy-1,5-lactams, 2, 8, 12 and 17, respectively. Reduction of the lactam function using sodium borohydride/acetic or trifluoroacetic acid, or borane dimethyl sulfide complex yielded the iminopentitols. The compounds 3, 9, 13 and 18, together with the three 1,5-dideoxy-1,5-iminoheptitols 19, 20 and 21 were tested for inhibition of the glycosidase activities present in an extract from human liver. Compound 18 was a potent and 19 a moderately good inhibitor of β-glucosidase. Compound 3 together with 19, 20 and 21, all having D-arabino-configuration at the hydroxy-substituted carbon atoms, were good inhibitors of α-L-fucosidase.
Synthesis of new N-containing maltooligosaccharides, α-amylase inhibitors, and their biological activities
Uchida, Riichiro,Nasu, Ayako,Tokutake, Shoichi,Kasai, Kouichi,Tobe, Koichiro,Yamaji, Nobuyuki
, p. 187 - 193 (1999)
Fifteen new N-containing maltooligosaccharides were obtained using the chemoenzymatic method. Among these compounds, maltooligosaccharides having 6- amino-6-deoxy-D-sorbitol residue, (3R,4R,5R,6S)-hexahydro-3,4,5,6- tetrahydroxy-1H-azepine residue, and (3R,5R)-3,4,5-trihydroxypiperidine residue at the reducing end showed strong inhibitory activities for human pancreatic α-amylase (HPA) (EC 3.2.1.1) and human salivary amylase (HSA). The administration of (3R,4R,5R,6S)-hexahydro-3,5,6-trihydroxy-1H-azepine-4- yl O-α-D-glucopyranosyl-(1→4)-α-D-glucopyranoside (13, IC50=4.3x10-5M for HPA, IC50=8.2x10-5M for HSA) and (3R,5R)-3,5-dihydroxypiperidine-4- yl O-α-D-glucopyranosyl-(1→4)-α-D-glucopyranoside (18, IC50=3.4x10-5M for HPA, IC50=4.6 x 10-5 M for HSA) to ICR mice suppressed postprandial hyperglycemia.
Preparation of Z-α,β-unsaturated diazoketones from aldehydes. Application in the construction of substituted dihydropyridin-3-ones
Rosset, Isac G.,Burtoloso, Antonio C. B.
, p. 9464 - 9470 (2013/10/08)
The stereoselective preparation of α,β-unsaturated diazoketones with Z geometry is described from aldehydes and a new olefination reagent. When prepared from amino aldehydes, these diazoketones could be converted to substituted dihydropyridin-3-ones in just one step, after an intramolecular N-H insertion reaction. The straightforward synthesis of a natural trihydroxylated piperidine demonstrates the utility of these unsaturated diazoketones for the rapid construction of piperidines.
Glycosynthase-Mediated Assembly of Xylanase Substrates and Inhibitors
Goddard-Borger, Ethan D.,Fiege, Brigitte,Kwan, Emily M.,Withers, Stephen G.
, p. 1703 - 1711 (2012/06/29)
An exo-β-xylosidase mutant with glycosynthase activity was created to aid in the synthesis of xylanase substrates and inhibitors. Simple monosaccharides were easily elaborated into di-, tri- and tetrasaccharides by using this enzyme. Some products proved