582-52-5Relevant articles and documents
Direct Access to 2,3,4,6-Tetrasubstituted Tetrahydro-2H-pyrans via Tandem SN2′-Prins Cyclization
Scoccia, Jimena,Pérez, Sixto J.,Sinka, Victoria,Cruz, Daniel A.,López-Soria, Juan M.,Fernández, Israel,Martín, Víctor S.,Miranda, Pedro O.,Padrón, Juan I.
, p. 4834 - 4837 (2017)
A new, direct, and diastereoselective synthesis of activated 2,3,4,6-tetrasubstituted tetrahydro-2H-pyrans is described. In this reaction, iron(III) catalyzed an SN2′-Prins cyclization tandem process leading to the creation of three new stereoc
Toward the construction of dermatan sulfate (DS) partial disaccharide library: Efficient synthesis of building blocks, common intermediate, and ligand conjugate of type-B DS disaccharide
Kakitsubata, Yuhei,Aramaki, Rikiya,Nishioka, Kyosuke,Wakao, Masahiro,Suda, Yasuo
, p. 1154 - 1157 (2016)
Dermatan sulfate (DS) is composed of a repeating disaccharide unit containing iduronic acid (IdoA) and N-acetylgalactosamine (GalNAc). In the divergent synthesis of DS disaccharide, it is important to prepare the IdoA moiety with a diverse set of protecti
Properties, stability, assay, and preliminary pharmacokinetics of the immunomodulatory 1,2-O-isopropylidene-3-O-3'(N',N'-dimethylamino-n-propyl)-D-glucofuranose hydrochloride
Garrett,Van Peer,Mahrous,Schuermann
, p. 387 - 395 (1982)
1,2-O-Isopropylidene-3-O-3(N',N'-dimethylamino-n-propyl)-D-glucufuranose hydrochloride (I) is a new agent with claimed immunomodulatory action and antiviral activity. Thin-layer chromatographic procedures and identifying tests were developed to separate the drug, its synthetic precursors, and solvolytic products, and were applied to stability studies. It is stable in 0.1N NaOH at 60° where its acid solvolysis product, 3-O-3'-(N',N'-dimethylamino-n-propyl)-D-glucose is readily degraded. The partition coefficient of I (pK'(a)=9.28) between chloroform and plasma was 6.4 ± 0.2 SEM between pH 10.5 and 11.0. Plasma and urine (0.5ml) adjusted to pH 11.0 were extracted with 10 ml of chloroform and the extract evaporated. The reconstituted residue in 50 μl of benzene, with the diiopropylaminoethyl analog of I as an internal standard, was derivatized with 50 μl of heptafluorobutyric anhydride at 60° for 45 min and was evaporated and reconstituted in 100 μl of benzene to be assayed for I by GLC with electron capture detection with a sensitivity of 5 ng/0.5 ml of biological fluid. The procedure was applied to pharmacokinetics in the dog and a two-compartment body model was observed with a terminal half-life of 103-130 min. At the 40mg dose, 60-40% was excreted renally unchanged and 20-34% as unidentified metabolites. At the 200-mg dose 82-85% was excreted renally unchanged and 15-17% as unidentified metabolites. The respective renal clerances of I were 135 and 163 ml/min. The respective total clearances of I were 204 and 191 ml/min. These metabolites were apparently unextracted with chloroform from biological fluids at pH 11 and the liquid scintillation counting (LSC) assay of extracted radiolabeled I appeared synonomous with the GLC assay of I in such fluids.
METHODS FOR MAKING DARUNAVIR P2-LIGAND PRECURSORS
-
Paragraph 0008; 0022; 0033, (2022/02/28)
A method for making an optically active P2-ligand precursor comprising converting D-xylose or a derivative thereof or D-glucose or a derivative thereof to the optically active P2-ligand precursor.
Exploring the Biochemical Foundations of a Successful GLUT1-Targeting Strategy to BNCT: Chemical Synthesis and in Vitro Evaluation of the Entire Positional Isomer Library of ortho-Carboranylmethyl-Bearing Glucoconjugates
Matovi?, Jelena,J?rvinen, Juulia,Sokka, Iris K.,Imlimthan, Surachet,Raitanen, Jan-Erik,Montaser, Ahmed,Maaheimo, Hannu,Huttunen, Kristiina M.,Per?niemi, Sirpa,Airaksinen, Anu J.,Sarparanta, Mirkka,Johansson, Mikael P.,Rautio, Jarkko,Ekholm, Filip S.
, p. 285 - 304 (2020/12/21)
Boron neutron capture therapy (BNCT) is a noninvasive binary therapeutic modality applicable to the treatment of cancers. While BNCT offers a tumor-targeting selectivity that is difficult to match by other means, the last obstacles preventing the full har
Visible-Light-Mediated Oxidative Debenzylation Enables the Use of Benzyl Ethers as Temporary Protecting Groups
Cavedon, Cristian,Sletten, Eric T.,Madani, Amiera,Niemeyer, Olaf,Seeberger, Peter H.,Pieber, Bartholom?us
supporting information, p. 514 - 518 (2021/01/26)
The cleavage of benzyl ethers by catalytic hydrogenolysis or Birch reduction suffers from poor functional group compatibility and limits their use as a protecting group. The visible-light-mediated debenzylation disclosed here renders benzyl ethers temporary protective groups, enabling new orthogonal protection strategies. Using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as a stoichiometric or catalytic photooxidant, benzyl ethers can be cleaved in the presence of azides, alkenes, and alkynes. The reaction time can be reduced from hours to minutes in continuous flow.
Triethylamine-methanol mediated selective removal of oxophenylacetyl ester in saccharides
Rasool, Javeed Ur,Kumar, Atul,Ali, Asif,Ahmed, Qazi Naveed
, p. 338 - 347 (2021/01/29)
A highly selective, mild, and efficient method for the cleavage of oxophenylacetyl ester protected saccharides was developed using triethylamine in methanol at room temperature. The reagent proved successful against different labile groups like acetal, ketal, and PMB and also generated good yields of the desired saccharides bearing lipid esters. Further, we also observed DBU in methanol as an alternative reagent for the deprotection of acetyl, benzoyl, and oxophenylacetyl ester groups. This journal is
Method for synthesizing release type xylose ester perfume for tobacco perfuming
-
Paragraph 0026-0028; 0041-0043; 0056-0058, (2021/10/27)
A synthesis method of a release type xylose ester spice for flavoring tobacco is provided. The glucose is used as a raw material, the principle of esterifying carboxylic acid and alcohol to prepare ester is adopted, a common parent carboxylic acid which c
Me3SI-promoted chemoselective deacetylation: a general and mild protocol
Gurawa, Aakanksha,Kashyap, Sudhir,Kumar, Manoj
, p. 19310 - 19315 (2021/06/03)
A Me3SI-mediated simple and efficient protocol for the chemoselective deprotection of acetyl groups has been developedviaemploying KMnO4as an additive. This chemoselective deacetylation is amenable to a wide range of substrates, tolerating diverse and sensitive functional groups in carbohydrates, amino acids, natural products, heterocycles, and general scaffolds. The protocol is attractive because it uses an environmentally benign reagent system to perform quantitative and clean transformations under ambient conditions.
Near-infrared glucose fluorescence probe and preparation method thereof
-
Paragraph 0052; 0096; 0103; 0104, (2020/01/14)
The invention relates to a near-infrared glucose fluorescent probe. The structural formula of the near-infrared glucose fluorescent probe is [Glu-1-O-DSCN (left), Glu-3-O-DSCN (middle), and Glu-2-N-DSCN (right)]. According to the near-infrared glucose fluorescent probe, an electron donor-acceptor structure (D-A) conjugated group DCSN is adopted as a fluorescent group, and the structural design ofthe DCSN-glucose probe is realized through an ether bond; the glucose group plays a specific recognition role in the probe, and water solubility and biocompatibility of a probe molecule can also be increased. According to the near-infrared glucose fluorescent probe, the raw materials are cheap and easy to obtain, the synthesis route is simple, and the glucose probe with strong penetrability, stable photochemistry, good biocompatibility, and high signal-to-noise ratio is obtained; and near-infrared glucose fluorescent probe can be applied to living cell staining, mitochondria localization, glucose tracking, brain tissue imaging, and tumor tissue labeling and identification.