[reaction: see text] A new method for the synthesis of beta-cyclodextrin-based cluster mannosides by application of the Sonogashira cross-coupling reaction is described. The method allows for the persubstitution of the beta-cyclodextrin at either 2- and 3-positions to give two types of heptavalent clusters, at both 2- and 6-positions to give clusters with 14 mannopyranoside units and at 2-, 3-, and 6-positions to obtain clusters with 21 mannopyranoside ligands.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ol034394l | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of the "Relative Ordered Structure of Polysaccharide" from Different Origins: Based on Similarity and Dissimilarity.
J Agric Food Chem
November 2023
State Key Laboratory of Food Science and Resources, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi Province 330047, China.
Article Synopsis
- Polysaccharides are common organic compounds with complex structures, and understanding their order and disorder is challenging.
- This study used techniques like FT-IR, methylation analysis, and H NMR spectroscopy to evaluate the structural order of polysaccharides from various regions, identifying four main structural types with specific glycoside linkages.
- The findings support a theoretical framework for classifying polysaccharide structures, revealing key characteristics of heteroglucans and heterogalactans that help simplify their complexity.
Regioselective B2-6 penta-iodination of the [CBH] monocarborane cluster by palladium catalysis.
Dalton Trans
August 2023
Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
Penta-iodination of the B2-6 positions of the {CB} monocarborane cluster is reported. Products of the structure [2,3,4,5,6-I-CBH-12-X] (X = H, Me, Et, Ph, Br, I) were obtained and fully characterized. X-ray crystal structures of three new compounds confirm this particular substitution pattern.
View Article and Find Full Text PDFWithin-Lineage Divergence of Avian Haemosporidians: A Case Study to Reveal the Origin of a Widespread Parasite.
J Parasitol
June 2019
1 Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, SE-22362, Sweden.
Avian haemosporidian parasites are particularly diverse and widespread. To date, more than 3,000 distinct cytochrome b lineages have been recorded, of which some present extremely wide geographical distributions, even including multiple continents. Whether these isolates represent one or several cryptic species remains unknown.
View Article and Find Full Text PDFPhotoelectron spectroscopy and density functional theory studies of (fructose + (HO)) (n = 1-5) anionic clusters.
Phys Chem Chem Phys
November 2017
Department of Chemistry, NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, CO 80523, USA.
Photoelectron spectroscopy (PES) and density functional theory (DFT) based calculations are executed to characterize gas phase, isolated (fructose + (HO)) (n = 1-5) anionic species produced using a matrix assisted laser desorption ionization (MALDI) method. Gas phase, isolated (fructose + (HO)) (n = 1-5) cluster anions mainly exist as open chain structures with conformational and positional isomers in the present experiments. Some cyclic structures of (fructose + (HO)) (n = 3, 4) are apparently present in the experiments and their VDEs can contribute to the lower energy shoulders of PES features observed for (fructose + (HO)) (n = 3, 4).
View Article and Find Full Text PDFSynthesis and Properties of Poly(ether sulfone)s with Clustered Sulfonic Groups for PEMFC Applications under Various Relative Humidity.
ACS Appl Mater Interfaces
March 2017
Institute of Atomic and Molecular Science, Academia Sinica , Taipei 10617, Taiwan.
Novel sulfonated poly(ether sulfone) copolymers (S4PH-x-PSs) based on a new aromatic diol containing four phenyl substituents at the 2, 2', 6, and 6' positions of 4,4'-diphenyl ether were synthesized. Sulfonation was found to occur exclusively on the 4 position of phenyl substituents by NMR spectroscopy. The ion exchange capacity (IEC) values can be controlled by adjusting the mole percent (x in S4PH-x-PS) of the new diol.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!