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Production of HMF-derivatives from wine residues using Saccharomyces cerevisiae as whole-cell biocatalyst.
Bioresour Bioprocess
January 2025
CEB - Centre of Biological Engineering, University of Minho, Campus Gualtar, Braga, 4710-057, Portugal.
Background: There is an urgent need to develop bioprocesses independent of fossil resources to address resource depletion and mitigate environmental harm. Transitioning to a bio-based economy requires prioritizing chemical production processes that utilize renewable resources, ensuring sustainability and environmental responsibility. 5-Hydroxymethylfurfural (HMF) and its derivatives are promising building blocks, ranked among the top 12 bio-based molecules derived from biomass.
View Article and Find Full Text PDFFunctional characterization and site-directed mutagenesis of a novel UDP-glycosyltransferase from Panax japonicus var. major.
Planta
January 2025
School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, China.
Ginsenosides R2 and F2 are key active components of Panax japonicus var. major which exhibit a wide range of pharmacological effects. However, few UDP-glycosyltransferases (UGTs) involved in Rh2 and F2 biosynthesis have been identified.
View Article and Find Full Text PDFEnantioselective Synthesis of α-Hydroxy Allyl Ketones via BINAP-CuH-Catalyzed Hydroacylation.
Angew Chem Int Ed Engl
January 2025
Indian Institute of Chemical Technology, Organic Synthesis and Process Chemistry, Uppal Road, 500607, Hyderabad, INDIA.
Catalytic hydrocupration of unsaturated carbon-carbon bonds to generate organometallic nucleophiles has recently become an attractive alternative to conventional stoichiometric reagents in the stereoselective synthesis. Herein, we have developed an efficient and economical method to synthesize enantiopure α-hydroxy allyl ketones via a copper hydride (CuH)-catalyzed hydroacylation of alkoxyallenes, a significant advancement given the scarcity of reports on such scaffolds in the literature. DFT calculations reveal that this reaction proceeds through the nucleophilic attack of a kinetically favourable Z-selective allyl-copper intermediate on acid anhydrides via a six-membered chair-like transition state, stabilized by strongly attractive non-covalent interactions that ultimately leads to high level of enantioselectivities using the simple BINAP ligand.
View Article and Find Full Text PDFRadical Strategy towards N-glycosides: Current Advances and Future Prospects.
Chembiochem
January 2025
Fuzhou University College of Chemistry, chemistry, CHINA.
N-glycosides exhibit diverse biological and pharmacological activities, making their efficient synthesis crucial for both biological research and drug development. Traditional acid-promoted N-glycosylation methods, which rely on the formation of oxocarbenium intermediates, often face significant challenges. These methods are water-sensitive and typically require neighboring group participation to achieve high selectivity.
View Article and Find Full Text PDFSpray-Assisted Fabrication of Cellulose Photonic Pigments on Superhydrophobic Surfaces.
Adv Mater
January 2025
Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Photonic pigments, especially those based on naturally-derived building blocks like cellulose nanocrystals (CNCs), are emerging as a promising sustainable alternative to absorption-based colorants. However, the proposed manufacturing methods for CNC pigments, via either grinding films or emulsion-based production, usually require several processing steps. This limits their commercialization by increasing the costs, timescales, and environmental impacts of production.
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