Results 111 to 120 of about 46,706 (268)

Synthetic Study on Bicyclic Pyranonaphthoquinone Natural Products: Construction of the Dioxabicyclo[3.3.1]nonene Motif

open access: yesChemistryEurope, EarlyView.
The method for the stereoselective formation of dioxabicyclo[3.3.1]nonene structure has been developed. The intriguing bicyclic skeleton is embedded in hybrid‐type pyranonaphthoquinone natural products, e.g., glenthamine Treatment of nanaomycin D and naphthol with Na2HPO4 in DMSO and water affords the bicyclic compound in good yield.
Yoshio Ando, Sota Ajima, Ken Ohmori
wiley   +1 more source

Investigations into the characterization, degradation, and applications of biodegradable polymers by mass spectrometry

open access: yesMass Spectrometry Reviews, EarlyView., 2023
Abstract Biodegradable polymers have been getting more and more attention because of their contribution to the plastic pollution environmental issues and to move towards a circular economy. Nevertheless, biodegradable materials still exhibit various disadvantages restraining a widespread use in the market.
Paola Rizzarelli   +2 more
wiley   +1 more source

Bioactive polyketides and meroterpenoids from the mangrove-derived fungus Talaromyces flavus TGGP35

open access: yesFrontiers in Microbiology
Six new polyketides, which includes three new lactones (talarotones A–C) (1–3), one new polyketide (talarotide A) (4), two new polyenes (talaroyenes A, B) (5, 6), together with one new meroterpenoid (talaropenoid A) (7) and 13 known compounds (8–20) were
Jin Cai   +26 more
doaj   +1 more source

Indole Synthesis via Allenyl Ester; Enantioselective Total Synthesis of Geissoschizoline

open access: yesChemistryEurope, EarlyView.
An indole synthesis via an allenyl ester intermediate at ambient temperature has been developed. The mild reaction conditions allow the use of a broad range of substrates. Notably, the utility of this approach is demonstrated through the asymmetric total synthesis of geissoschizoline, a Strychnos‐type monoterpenoid indole alkaloid.
Sohsuke Moriue   +5 more
wiley   +1 more source

Strategies Toward Synthesis and Conversion of Lignin Model Compounds

open access: yesChemistry – A European Journal, EarlyView.
The conversion of lignin toward value‐added products relies on the cleavage of C─C and C─O bonding patterns, which has proven to be a difficult task previously, with numerous factors at play. The employment of model compounds which are fashioned on the structure and linkages found within lignin aids in the development of catalytic processes which can ...
Gary N. Sheldrake   +1 more
wiley   +1 more source

The Synthesis of Aryl‐β‐C‐Glycosides from Native Saccharides

open access: yesChemistry – A European Journal, EarlyView.
Native mono‐, di‐, and trisaccharides are converted into p‐nitrophenol‐β‐C‐glycosides in a one‐pot reaction using water as the solvent. A sequence of condensation reactions is used to construct the aromatic ring from acyclic precursors. Using this approach, a modular synthesis of SGLT2‐inhibitor scaffolds was developed and applied to a novel protecting‐
Daan V. Bunt   +5 more
wiley   +1 more source

THE HYDROGENATION OF UNSATURATED LACTONES TO DESOXY ACIDS

open access: hybrid, 1930
Walter A. Jacobs, Albert B. Scott
openalex   +1 more source

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