13343-63-0Relevant articles and documents
Sugar derived alkamine catalytic imine reduction method
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Paragraph 0043; 0044; 0045, (2016/10/07)
The invention discloses a method used for catalytic reduction of imine with saccharide-derivatized amino alcohol. According to the method, imine is taken as a substrate. The method comprises following steps: 1) imine and saccharide-derivatized amino alcohol are dissolved in an organic solvent I, wherein molar ratio of imine to saccharide-derivatized amino alcohol ranges from 100:1-20; 2) trichlorosilane with 1.5 to 5 times equivalent weights is added into a solution obtained via step 1) dropwise, an obtained mixture is stirred and reacted for 12 to 36h at a temperature of -20 to 40 DEG C, and a saturated sodium bicarbonate solution is used for quenching; 3) a material obtained via step 2) is extracted with an organic solvent II, and is subjected to column chromatography isolation so as to obtain amine compounds.
Synthesis of N -acetyl glucosamine analogs as inhibitors for hyaluronan biosynthesis
Wasonga, Gilbert,Tatara, Yota,Kakizaki, Ikuko,Huang, Xuefei
, p. 392 - 409 (2013/10/08)
Elevated hyaluronan expression is a hallmark of many types of cancer. Therefore, inhibition of hyaluronan biosynthesis can potentially slow the growth of tumor cells. Herein, we explore a chain termination strategy to reduce hyaluronan synthesis by tumor cells. Several analogs of glucosamine were prepared, which contained modifications at the C-3 positions. These analogs can possibly cap the nonreducing end of a growing hyaluronan chain, thus lowering the amount of hyaluronan synthesized. Upon incubation with pancreatic cancer cells, a fluorine-containing glucosamine analog was found to exhibit significant inhibitory activities of hyaluronan synthesis. Furthermore, it drastically reduced the proliferation of cancer cells. Supplemental materials are available for this article. Go to the publisher's online edition of Journal of Carbohydrate Chemistry to view the supplemental file.
Phosphoramidates of monosaccharides
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Page/Page column 29, (2012/07/14)
The present invention relates novel phosphoramidates of monosaccharides of formula (I), wherein R1 is a monosaccharide group selected from A and B; R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 and X are as defined herein. Preferably X is -O-. The present invention also provides processes for the production of compounds of formula (I), pharmaceutical compositions comprising these compounds, as well as to the use thereof in medical therapy, preferably in the treatment of osteoarthritis. wherein: R1 is selected from A and B,
Novel phosphoramidate prodrugs of N-acetyl-(d)-glucosamine with antidegenerative activity on bovine and human cartilage explants
Serpi, Michaela,Bibbo, Rita,Rat, Stephanie,Roberts, Helen,Hughes, Claire,Caterson, Bruce,Alcaraz, María José,Gibert, Anna Torrent,Verson, Carlos Raul Alaez,McGuigan, Christopher
supporting information; experimental part, p. 4629 - 4639 (2012/07/01)
(d)-Glucosamine and other nutritional supplements have emerged as safe alternative therapies for osteoarthritis (OA), a chronic and degenerative articular joint disease. In our preceding paper, a series of novel O-6 phosphate N-acetyl (d)-glucosamine prod
PHOSPHORAMIDATES OF MONOSACCHARIDES
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Page/Page column 45, (2012/08/27)
The present invention relates novel phosphorainidates of monosaccharides of formula (I), wherein R1 is a monosaccharide group selected from A and B: R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 and X are as defined herein. Preferably X is -0-. The present invention also provides processes for the production of compounds of formula (I), pharmaceutical compositions comprising these compounds, as well as to the use thereof in medical therapy, preferably in the treatment of osteoarthritis. Formula (I) wherein: R1 is selected from A and B.
Synthesis of novel carbohydrate-based chiral P, N ligands and their applications in Cu-catalyzed enantioselective 1, 4-conjugate additions
Xia, Haijun,Yan, Hua,Shen, Chao,Shen, Fangyi,Zhang, Pengfei
, p. 155 - 158 (2012/03/08)
A new type of phosphate-pyridine (P, N) ligand derived from d-glucosamine and BINOL was synthesized and successfully applied in Cu-catalyzed enantioselective conjugate addition of diethylzinc to chalcones for the first time, high yields and enantioselectivities were obtained when the ligand 10a which contains (S)-BINOL was used. The results also showed that the configuration of BINOL at the ligand backbone had remarkable effects on the activities and enantioselectivities.
Synthesis of novel carbohydrate-based iminophosphinite ligands in Pd-catalyzed asymmetric allylic alkylations
Shen, Chao,Xia, Haijun,Zheng, Hui,Zhang, Pengfei,Chen, Xinzhi
scheme or table, p. 1936 - 1941 (2010/11/17)
A series of novel carbohydrate-based iminophosphinite ligands have been synthesized for the first time and successfully applied in Pd-catalyzed asymmetric allylic alkylation. The substituent effects on the catalytic reaction were also investigated, and 92% ee was achieved when the p-nitro-substituted ligand 10d was used.
Optimization of UDP-N-acetylmuramic acid synthesis
Humljan, Jan,Starcevic,Car,Stefanic Anderluh,Kocjan,Jenko,Urleb
, p. 102 - 106 (2008/09/21)
UDP-N-acetylmuramic acid (UDP-MurNAc) is a substrate of MurC, an important enzyme in the intracellular pathway of bacterial peptidoglycan biosynthesis. Various approaches towards preparation of UDP-Mur/VAc have been published but these synthetic preparations were shown to include many problematic steps. An optimization study with the focus on muramyl phosphate and UMP-morpholidate coupling was performed, resulting in a synthetic procedure enabling robust and easily reproducible production on a multi-gram scale.
Synthesis of anomerically pure, furanose-free α-benzyl-2-amino-2- deoxy-D-altro- and D-manno-pyranosides and some of their derivatives
Chiu, Tony M. K.,Sigillo, Katina,Gross, Paul H.,Franz, Andreas H.
, p. 2355 - 2381 (2008/02/10)
The anomerically pure benzyl α-d-glycoside of 2-amino-2-deoxy- mannopyranoside was synthesized from d-glucopyranose via 2-amino-2-deoxy-d- altrose intermediates. Unlike the direct synthesis from mannosamine in the literature, our method provides furanose-
Methods for synthesis of alpha-d-gal (1~>3) gal-containing oligosaccharides
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, (2008/06/13)
This invention relates to reagents and methods for synthesis of biologically active di- and tri-saccharides comprising α-D-Gal(1→3)-D-Gal. In particular the invention provides novel reagents, intermediates and processes for the solution or solid phase synthesis of α-D-galactopyranosyl-(1→3)-D-galactose, and derivatives thereof. In one preferred embodiments the invention provides a protected monosaccharide building block of general formula (II): in which R3 is methoxy or methyl; R1 is H, benzoyl, pivaloyl, 4-chlorobenzoyl, acetyl, chloroacetyl, levulinoyl, 4-methylbenzoyl, benzyl, 3,4-methylenedioxybenzyl, 4-methoxybenzyl, 4-chlorobenzyl, 4-acetamidobenzyl, or 4-azidobenzyl; and R2 is H, Fmoc, benzoyl, pivaloyl, 4-chlorobenzoyl, acetyl, chloroacetyl, levulinoyl, 4-methylbenzoyl, benzyl, 3,4-methylenedioxybenzyl, 4-methoxybenzyl, 4-chlorobenzyl, 4-acetamidobenzyl, or 4-azidobenzyl.
