A series of 22 aromatic aldehyde/ketone 4-(beta-D-glucopyranosyl)thiosemicarbazones have been synthesized by condensation of 4-(per-O-acetylated-beta-D-glucopyranosyl)thiosemicarbazide with an aldehyde or a ketone, and then, deacetylation of the resulting product. The compounds were fully characterized by spectroscopic techniques, elemental analysis, and for two derivatives by X-ray analysis. The data indicate the beta configuration, and the E configuration pertaining to the stereochemistry of the C=N bond. However, a partial conversion of the E-form into the Z-form is possible in solution after several hours.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.carres.2009.05.010 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Production of aromatic hydrocarbons from catalytic fast pyrolysis of microalgae over Fe-modified HZSM-5 catalysts.
RSC Adv
November 2024
School of Energy Materials and Chemical Engineering, Hefei University Hefei 230601 China.
Article Synopsis
- The study investigates the catalytic fast pyrolysis of microalgae using Fe-modified HZSM-5 catalysts to produce aromatic hydrocarbons, analyzed through Py-GC/MS.
- Various Fe loadings (3-12 wt%) and pyrolysis temperatures (450-600 °C) were tested, revealing that an 8 wt% Fe loading at 500 °C yielded the highest aromatic hydrocarbon content at 42.5%.
- The modification with Fe improved the catalyst properties by increasing the total acid amount, enhancing the production of monocyclic aromatic hydrocarbons while reducing unwanted compounds like polycyclic aromatic hydrocarbons.
Investigation of bioactive phytochemical compounds of the Ethiopian medicinal plant using GC-MS and FTIR.
Heliyon
August 2024
School of Mechanical and Chemical Engineering, Kombolcha Institute Technology, Wollo University, p.o.box 208, Ethiopia.
Medicinal plants Highly aromatic crude materials are utilized for treating warts as an alternative medicine to surgical treatment because they can be permanently removed from the body. Thus, this investigation aimed to extract plant material from leaves, describe the phytochemical screening, analyze anti-microbial activities, determine the functional groups in FTIR, and identify the chemical compounds in GC-MS. The PH, specific gravity, and viscosity of the crude extracts of were determined at 4.
View Article and Find Full Text PDFBioLindlar Catalyst: Ene-Reductase-Promoted Selective Bioreduction of Cyanoalkynes to Give (Z)-Cyanoalkenes.
Angew Chem Int Ed Engl
September 2024
Organic and Inorganic Chemistry Department, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain.
The direct synthesis of alkenes from alkynes usually requires the use of transition-metal catalysts. Unfortunately, efficient biocatalytic alternatives for this transformation have yet to be discovered. Herein, the selective bioreduction of electron-deficient alkynes to alkenes catalysed by ene-reductases (EREDs) is described.
View Article and Find Full Text PDFNickel-Doped Decatungstate as a Robust Photocatalyst for Violet Light-Triggered Redox Coupling Conversion of Alcohol and Water to Aldehyde/Ketone and Hydrogen.
Inorg Chem
June 2024
National & Local United Engineering Laboratory for New Petrochemical Materials & Fine Utilization of Resources, Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province and Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
The effective coupling of photoinduced alcohol oxidation and water reduction may economically produce hydrogen (H) from water, which is of great significance in solving the current energy crisis. This study discloses that decatungstate (DT) and especially Niions-doped DTs are active for the photoreaction of benzyl alcohol with HO, and under 48 h of violet light illumination, the best 1%Ni-DT yields ca. 86.
View Article and Find Full Text PDFReductive dissolution of As-bearing iron oxides: Mediating mechanism of fulvic acid and dissimilated iron reducing bacteria.
Sci Total Environ
July 2024
Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China; Institute of Environmental Geology, Inner Mongolia University, 010021 Hohhot, China. Electronic address:
Fulvic acid (FA) and iron oxides often play regulating roles in the geochemical behavior and ecological risk of arsenic (As) in terrestrial ecosystems. FA can act as electron shuttles to facilitate the reductive dissolution of As-bearing iron (hydr)oxides. However, the influence of FA from different sources on the sequential conversion of Fe/As in As-bearing iron oxides under biotic and abiotic conditions remains unclear.
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!