582-52-5Relevant academic research and scientific papers
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
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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.
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.
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
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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
Synthesis and Structure-Activity Relationship Studies of C2-Modified Analogs of the Antimycobacterial Natural Product Pyridomycin
Kienle, Maryline,Eisenring, Patrick,Stoessel, Barbara,Horlacher, Oliver P.,Hasler, Samuel,Van Colen, Gwéna?lle,Hartkoorn, Ruben C.,Vocat, Anthony,Cole, Stewart T.,Altmann, Karl-Heinz
supporting information, p. 1105 - 1131 (2020/03/10)
A series of derivatives of the antimycobacterial natural product pyridomycin have been prepared with the C2 side chain attached to the macrocyclic core structure by a C-C single bond, in place of the synthetically more demanding enol ester double bond found in the natural product. Hydrophobic C2 substituents of sufficient size generally provide for potent anti-Mtb activity of these dihydropyridomycins (minimum inhibitory concentration (MIC) values around 2.5 μM), with several analogs thus approaching the activity of natural pyridomycin. Surprisingly, some of these compounds, in contrast to pyridomycin, are insensitive to overexpression of InhA in Mycobacterium tuberculosis (Mtb). This indicates that their anti-Mtb activity does not critically depend on the inhibition of InhA and that their overall mode of action may differ from that of the original natural product lead.

