19488-41-6Relevant academic research and scientific papers
A One-Pot Method for Removal of Thioacetyl Group via Desulfurization under Ultraviolet Light to Synthesize Deoxyglycosides
Ge, Jian-Tao,Zhou, Lang,Luo, Tao,Lv, Jian,Dong, Hai
supporting information, p. 5903 - 5906 (2019/08/26)
We herein developed an efficient method for removing thioacetyl to synthesize acylated deoxy glycosides in a one-pot reaction, where the thioacetyl was selectively deacetylated by hydrazine hydrate in DMF within 2-5 min at room temperature, followed by de
From glycoside hydrolases to thioglycoligases: The synthesis of thioglycosides
Stick, Robert V.,Stubbs, Keith A.
, p. 321 - 335 (2007/10/03)
The treatment of various glycosyl acceptors, each containing a reactive thiol group, with the appropriate glycosyl donor and a glycoside hydrolase or glycosynthase, failed to yield any thioglycosides - only the products of O-glycosylation were formed. However, thioglycosides were formed when a thioglycoligase was used to mediate the reaction between acceptor and donor. In fact, pyranose acceptors possessing a thiol group at C3, C4 or C6 (but not C2) were all capable of conversion into thioglycosides. Some comment is given regarding the mechanism of the various processes.
Hydrolytic activity of α-galactosidases against deoxy derivatives of p- nitrophenyl α-D-galactopyranoside
Hakamata, Wataru,Nishio, Toshiyuki,Oku, Tadatake
, p. 107 - 115 (2007/10/03)
The four possible monodeoxy derivatives of p-nitrophenyl (PNP) α-D- galactopyranoside were synthesized, and hydrolytic activities of the α- galactosidase of green coffee bean, Mortierella vinacea and Aspergillus niger against them were elucidated. The 2- and 6-deoxy substrates were hydrolyzed by the enzymes from green coffee bean and M. vinacea, while they scarcely acted on the 3- and 4-deoxy compounds. On the other hand, A. niger α- galactosidase hydrolyzed only the 2-deoxy compound in these deoxy substrates, and the activity was very high. These results indicate that the presence of two hydroxyl groups (OH-3 and -4) is essential for the compounds to act as substrates for the enzymes of green coffee bean and M. vinacea, while the three hydroxyl groups (OH-3, -4, and -6) are necessary for the activity of the A. niger enzyme. The kinetic parameters (K(m) and V(max)) of the enzymes for the hydrolysis of PNP α-D-galactopyranoside and its deoxy derivatives were obtained from kinetic studies. (C) 2000 Elsevier Science Ltd.
NON-PEPTIDE PEPTIDOMIMETICS
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, (2008/06/13)
Compounds are provided which are crossreactive with peptides such as those which bind G-protein-linked receptors, together with preparative and therapeutic methods therefor. The compounds have the general structure: STR1 wherein at least one of R 1, R 2, R. sub.3, R. sub.4, or R 5 comprises a functional group which is chemically similar to that found in the peptide of interest.
Synthesis of methyl O-α-L-rhamnopyranosyl-(12)-α-D-galactopyranosides specifically deoxygenated at position 3, 4, or 6 of the galactose residue
Mulard, Laurence A.,Kovac, Pavol,Glaudemans, Cornelis P. J.
, p. 213 - 232 (2007/10/02)
The title disaccharides were synthesized by condensation of 2,3,4-tri-O-benzoyl-α-L-rhamnopyranosyl bromide with suitably protected, deoxygenated derivatives of methyl α-D-galactopyranoside.Deoxygenation was achieved via activation of a protected methyl α
De novo design and synthesis of somatostatin non-peptide peptidomimetics utilizing β-D-glucose as a novel scaffolding
Hirschmann, Ralph,Nicolaou,Pietranico, Sherrie,Leahy, Ellen M.,Salvino, Joseph,Arison, Byron,Cichy, Maria A.,Grant Spoors,Shakespeare, William C.,Sprengeler, Paul A.,Hamley, Peter,Smith III, Amos B.,Reisine, Terry,Raynor, Karen,Maechler, Laurie,Donaldson, Cindy,Vale, Wylie,Freidinger, Roger M.,Cascieri, Margaret R.,Strader, Catherine D.
, p. 12550 - 12568 (2007/10/02)
Non-peptide peptidomimetics of the peptide hormone somatostatin (SRIF) were designed and synthesized, utilizing β-D-glucose as a novel scaffolding. Such compounds resemble conventional peptide analogs in that they retain critical amino acid side chains bu
Building Units of Oligosaccharides, CIII. - Synthesis of Modified Derivatives of the Disaccharide β-D-Gal-(1->3)-α-D-GalNAc for the Examination of Substrate Specifities of Core 2-β6-GlcNAc-Transferase and α-3-Sialyltransferase Involved in the Biosynthesis
Paulsen, Hans,Rutz, Volker,Brockhausen, Inka
, p. 747 - 758 (2007/10/02)
Derivatives of benzyl β-D-galactopyranosyl-(1->3)-2-acetamido-2-deoxy-α-D-galactopyranoside have been synthesized.The 6'-, 4'- and 3'-OH group of the galactose moiety as well as the 6- and 4-OH and the 2-acetamido group of the 2-acetamido-2-deoxy-D-galact
Synthesis of specifically deoxygenated ligands related to (1->6)-β-D-galacto-oligosaccharides, and studies on their binding to monoclonal antigalactan antibodies
Ziegler, Thomas,Pavliak, Viliam,Lin, Tsu-Hsing,Kovac, Pavol,Glaudemans, Cornelis P. J.
, p. 167 - 186 (2007/10/02)
Synthetic deoxygenated derivatives of methyl β-glycosides of (1->6)-β-D-galacto-oligosaccharides were prepared, and their binding to antigalactan monoclonal antibodies X24 and J539 (Fab') was studied.The results suggest the involvement of an additional, critical hydrogen bond in the highest affinity subsite (A), which now appears to require two hydrogen bonds from the 2- and 3-hydroxyls of the galactosyl residue to the protein, and one from the protein to O-4 of that residue.The data obtained with a series of oligosaccharides deoxygenated at position 31, 32,33, 41, 42, or 43 support the binding patterns and subsite-arrangement inferred previously from studies with large numbers of deoxyfluoro-substituted ligands and this family of antibodies.
