Results 111 to 120 of about 46,706 (268)
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
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
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
IV. On the Chemical Structure of Ipomic Lactone
Takashi Kubôta, Teruo Matsuura
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Indole Synthesis via Allenyl Ester; Enantioselective Total Synthesis of Geissoschizoline
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
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
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A METHOD FOR THE SYNTHESIS OF LACTONES OF SUBSTITUTED CROTONIC ACIDS. CONDENSATION OF β-ARYL GLUTACONIC ANHYDRIDES WITH PHENOLIC ETHERS [PDF]
V. M. BHAVE, R. V. BHAGWAT
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The Synthesis of Aryl‐β‐C‐Glycosides from Native Saccharides
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
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THE HYDROGENATION OF UNSATURATED LACTONES TO DESOXY ACIDS
Walter A. Jacobs, Albert B. Scott
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