67776-38-9Relevant academic research and scientific papers
Design, synthesis and biological evaluation of carbohydrate-based sulphonamide derivatives as topical antiglaucoma agents through selective inhibition of carbonic anhydrase II
Fan, Zhanfang,Guo, Chun,Hou, Zhuang,Li, Chuanchao,Lin, Bin,Liu, Yang,Liu, Yichuang,Wang, Yitong,Zhang, Miao
, p. 383 - 390 (2019/12/30)
A series of new carbohydrate-based sulphonamide derivatives were designed, synthesised by employing the so-call ‘sugar-tail’ approach. The compounds were evaluated in vitro against a panel of CAs. Compared to their parent compound p-sulfamoylbenzoic acid, these compounds showed nearly 100-fold improvement in their binding affinities against hCA II in vitro. All of compounds showed great water solubility and the pH value of their water solutions of compounds is 7.0. Such properties are advantageous to make them much less irritating to the eye when applied topical glaucomatous drugs, compared to the relatively highly acidic dorzolamide preparations (pH 5.5). Notably, compounds 7d, 7 g, 7 h demonstrated to topically lower intraocular pressure (IOP) in glaucomatous animals better than brinzolamide when applied as a 1% solution directly into the eye. Low cytotoxicity on human cornea epithelial cell was observed in the tested concentrations by the MTT assay.
OLIGONUCLEOTIDE DERIVATIVE, OLIGONUCLEOTIDE CONSTRUCT USING THE SAME, AND METHODS FOR PRODUCING THEM
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Paragraph 0171-0173, (2018/04/19)
The oligonucleotide derivative of the present invention is represented by Formula (1). This derivative is considered to be introduced into cells by binding of its amino sugar chain moiety to a ligand on cell surfaces, and have selective drug delivery function. The oligonucleotide derivative can be easily synthesized and introduced into cells without using a lipofection reagent. wherein—A and B are independently modified or unmodified oligonucleotides whose total chain length is 3 or more, and A and B do not contain hydroxyl groups at 3′ and 5′ ends of the oligonucleotide; S represents a sugar substituent, a peptide chain, or a tocopherol-binding group; and an alkyl group may be bound instead of hydrogen bound to a benzene ring.
Influence of pyranose and spacer arm structures on phloem mobility and insecticidal activity of new tralopyril derivatives
Chen, Yao,Lei, Zhi Wei,Zhang, Ying,Yang, Wen,Liu, Hui Fang,Zhou, Yu Feng,Yang, Mao Fa
, (2017/07/03)
Six new conjugates were designed and synthesized by introducing glucose, methyl glucuronate or glucuronic acid moieties on tralopyril. Phytotoxicity and phloem mobility results demonstrated that the introduction of glucose, methyl glucuronate or glucuronic acid moieties can simultaneously solve the tough phytotoxicity problem and phloem mobility transformation of tralopyril. Conjugates 12 and 18 containing the glucuronic acid moiety exhibited higher phloem mobility than conjugates 9, 11, 15 and 17. Conjugates 15, 17 and 18 with methoxymethyl groups on the tralopyril pyrrole nitrogen atom showed activity against Plutella xylostella, while conjugates 9, 11 and 12 with a methene group on the pyrrole N showed no activity. Cabbage roots were incubated in a buffered solution containing conjugates 15, 17 and 18 at 4 mM for 72 h. Only 18 showed systemic insecticidal activity with 100% mortalityagainst P. xylostella, while 15 and 17 showed lower activity andchlorfenapyr showed no activity. The glucuronic acid promoiety imparted more phloem mobility to tralopyril than glucose and methyl glucuronate. The methoxymethyl group bond on the tralopyril skeleton was the key factor in determining the insecticidal activity of the conjugates. A promising systemic proinsecticide containing glucuronic acid and tralopyril moieties was proposed.
Selective and Sensitive Sensing of Free Bilirubin in Human Serum Using Water-Soluble Polyfluorene as Fluorescent Probe
Senthilkumar,Asha
, p. 3449 - 3461 (2015/06/22)
The adherence of serum protein on conjugated polymer is a major bottleneck in the application of the latter for selective sensing of small biomolecules in blood serum. In this report, we present new polyfluorenes with d-glucuronic acid appendage that is a nonreceptor for any serum protein, thereby providing a platform for selective sensing of free bilirubin in the clinically relevant range of 50 μmol/L in human blood serum. The appended d-glucuronic acid formed noncovalent interactions with bilirubin, which in conjunction with favorable spectral overlap between the polymers and bilirubin facilitated efficient FRET process in aqueous solutions. Addition of bilirubin resulted in the quenching of the polyfluorene emission with simultaneous appearance of bilirubin emission exhibiting visual emission color change from blue to light green. The polymer remained stable in serum even under severe basic conditions and exhibited high selectivity with visual sensitivity only toward free bilirubin in human serum in the presence of crucial interferences such as hemoglobin, proteins, biliverdin, glucose, cholesterol, and metal ions. Nanomolar sensing of bilirubin could also be demonstrated successfully using one of the d-glucuronic acid appended polymer (PF-Ph-GlcA), which could sense ～150 nm of bilirubin in human serum. The combined role of energy transfer and noncovalent interaction highlights the potential of the new polymer design for highly selective sensing activity in complex biofluids.
A generalized procedure for the one-pot preparation of glycosyl azides and thioglycosides directly from unprotected reducing sugars under phase-transfer reaction conditions
Kumar, Rishi,Tiwari, Pallavi,Maulik, Prakas R.,Misra, Anup K.
, p. 74 - 79 (2007/10/03)
Per-O-acetylated glycosyl azides and thioglycosides were prepared in excellent yield directly from unprotected reducing sugars through in situ generation of per-O-acetylated glycosyl bromides by a generalized one-pot procedure under phase-transfer conditions. Stereoselective products were formed with complete inversion at the anomeric centers of the glycosyl bromides to provide a general high-yielding procedure for the preparation of 1,2-trans-glycosyl azides and thioglycosides. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
DIFFERENTIATION MODULATING AGENTS AND USES THEREFOR
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Page/Page column 183, (2010/02/12)
This invention discloses methods and agents for modulating the differentiation potential and/or proliferation of preadipocytes. More particularly, the present invention discloses methods and agents for modulating a fibroblast growth factor (FGF) signalling pathway, especially the FGF-1 or FGF-2 signalling pathway, for treating or preventing adiposity-related conditions including, but not limited to, obesity, lipoma and lipomatosis.
Development of carbohydrate-based scaffolds for restricted presentation of recognition groups. Extension to divalent ligands and implications for the structure of dimerized receptors
Murphy, Paul V.,Bradley, Helena,Tosin, Manuela,Pitt, Nigel,Fitzpatrick, Geraldine M.,Glass, W. Kenneth
, p. 5692 - 5704 (2007/10/03)
The solution structure of glycosyl amides has been studied by using NMR. A strong preference is displayed by tertiary aromatic glycosyl amides for E-anti structures in contrast with secondary aromatic glycosyl amides where Z-anti structures predominate. The structural diversity displayed by these classes of molecules would seem to be important as the directional properties of the aromatic ring, or groups attached to the aromatic ring, would be determined by choosing to have either a secondary or tertiary amide at the anomeric center and could be considered when designing bioactive molecules with carbohydrate scaffolds. The structural analysis was also carried out for related divalent secondary and tertiary glycosyl amides and these compounds display preferences similar to that of the monovalent compounds. The constrained divalent compounds have potential for promoting formation of clusters that will have restricted structure and thus have potential for novel studies of mechanisms of action of multivalent ligands. Possible applications of such compounds would be as scaffolds for the design and synthesis of ligands that will facilitate protein - protein or other receptor - receptor interactions. The affinity of restricted divalent (or higher order) ligands, designed to bind to proteins that recognize carbohydrates which would facilitate clustering and concomitantly promote protein - protein interactions, may be significantly higher than monovalent counterparts or multivalent ligands without these properties. This may be useful as a new approach in the development of therapeutics based on carbohydrates.
Synthesis of α-glucuronic acid and amide derivatives in the presence of a participating 2-acyl protecting group
Tosin, Manuela,Murphy, Paul V.
, p. 3675 - 3678 (2007/10/03)
(graph presented) Participating acyl groups located at C-2 in glucosyl and related donors generally promote formation of 1,2-trans-glycosides. Reactions of some glucuronic acid donors with TMSN3/SnCl4 or ROH/SnCl4 gave only the 1,2-cis-glycoside. The stereoselectivity is consistent with participation of the C-6 group. The methodology was used for the synthesis of a Kdn2en mimetic with the α-configuration.
Rapid access to uronic acid-based mimetics of Kdn2en from D-glucurono-6,3-lactone
Florio, Pas,Thomson, Robin J.,Von Itzstein, Mark
, p. 445 - 448 (2007/10/03)
A concise route to novel mimetics of Kdn2en, based on Δ4-uronic acids, from D-glucurono-6,3-lactone is presented. Uronic acid-based mimetics in which an aliphatic ether (O-glycoside), a thioether (S-glycoside), or acetamide takes the place of the natural C-6 glycerol sidechain of the sialic acid were synthesized from the key intermediate, methyl 2,3,4-tri-O-acetyl-α-D-glucopyranosyluronate bromide. (C) 2000 Elsevier Science Ltd.
N-linked glycoside/glucuronide conjugates of retinoids: Acitretin
Balakrishnan,Gilbert,Brueggemeier,Curley Jr.
, p. 3033 - 3038 (2007/10/03)
Glucuronide conjugates of retinoids have been found to be active metabolites of the parent molecules. However, O-acylglucuronide retinoids are liable to hydrolysis and retinoid ring oxidation. We have prepared stable N-linked glycosides of acitretin in efforts to overcome these problems. The synthesis and preliminary biological studies of the analogs are reported.
