Results 111 to 120 of about 39,482 (297)

Catalytic Conversion of Glucose and Chlorella Sp. Into Furans in the Presence of Niobium Oxide

open access: yesChemical Engineering Transactions, 2023
A series of Nb2O5 solid catalysts have been prepared to be used for the catalytic dehydration of glucose and sugars from algae Chlorella sp. into added value furans. The glucose transformation gave rise to 5-hydroxymethylfurfural (5-HMF).
Elisa I. Garcia-Lopez   +3 more
doaj  

3-Oxabicyclo[3,2,0]hepta-1,4-diene [PDF]

open access: yes, 1973
3-Oxabicyclo[3,2,0]hepta-1,4-diene (3) has been synthesized by partial hydrogenation of 3-oxabicyclo-[3,2,0]hepta-1,4,6-triene (2)
Bergman, R. G., Vollhardt, K. Peter C.
core  

Room‐Temperature Helix‐to‐Disc Conversion of Thia[6]helicene S,S‐Dioxides to Coronene via In Situ Phenoxide Anion Generation

open access: yesChemistry – A European Journal, EarlyView.
In situ phenoxide formation at the benzene terminus triggers room‐temperature conversion of thia[6]helicene S,S‐dioxides to coronene. The solubility contrast drives product precipitation, enabling isolation by simple filtration. This pericyclic annulation between the helical termini provides direct access to coronene‐type planar architectures ...
Kaito Seino, Takashi Murase
wiley   +1 more source

Control of Dioxins From the Pulp and Paper Industry Under the Clean Water Act and Lead in Soil at Superfund Mining Sites: Two Case Studies in EPA's Use of Science [PDF]

open access: yes
This paper discusses EPA's acquisition and use of science in addressing dioxins (and other organochlorines) from the pulp and paper industry under the Clean Water Act and lead in soil at large Superfund mining sites.
Powell, Mark
core  

Exploring the boundaries of vinylogous Mukaiyama aldol processes: stereoselective access to polyunsaturated homoallylic alcohols [PDF]

open access: yes, 2013
Catalytic enantioselective vinylogous aldol reactions using extended enolates are of prominent value in synthetic organic chemistry. Here, we report our advances in the development of enantioselective bis-vinylogous and hyper-vinylogous Mukaiyama aldol ...
Battistini, Lucia   +4 more
core  

Mild N‑Arylation of Sulfoximines With (Hetero)aryl Chlorides Enabled by α‐Methylnaphthyl‐tBuBrettPhos Palladium Triflate

open access: yesChemistry – A European Journal, EarlyView.
A readily accessible, air‐ and moisture‐stable palladium precatalyst, [Pd(1‐MeNAP)(tBuBrettPhos)]OTf, enables the direct N‐arylation of NH‐sulfoximines with (hetero)aryl chlorides under exceptionally mild conditions ideal for late‐stage diversification of drug‐like scaffolds.
Sourav Manna   +5 more
wiley   +1 more source

Formic Acid Stabilization on Supported Ionic Liquid Phases: Insights from Solid‐State NMR Spectroscopy

open access: yesChemistry – A European Journal, EarlyView.
Solid‐state NMR spectroscopy reveals insights into interactions between formic acid and molecularly‐modified silica surfaces. Our findings contribute to a mechanistic understanding of the stabilization of formic acid by ionic liquid structures, with significant implications for the formic acid production from CO2 hydrogenation and adaptive catalysis ...
Yufei Wu   +4 more
wiley   +1 more source

Sustainable Synthesis of 4,7‐Dihydro‐4,7‐ethano‐2H‐isoindoles—Key Building Blocks to Benzoporphyrins

open access: yesChemistry – A European Journal, EarlyView.
A facile and sustainable route to isoindole derivatives—key benzoporphyrin precursors—brings high‐ and low‐symmetry benzoporphyrins closer to practical application. ABSTRACT Benzoporphyrins, π extended porphyrin analogues, exhibit remarkable potential for optoelectronic and theragnostic applications, yet have remained largely confined to fundamental ...
Lampros Pascal Gazetas   +5 more
wiley   +1 more source

Strain Release of 1‐Azabicyclo[1.1.0]butanes as a Gateway to Highly Functionalized Azetidines: New Strategies and Structural Motifs

open access: yesChemistry – A European Journal, EarlyView.
Over the past decade, the interest in azetidines has continuously risen, by virtue of their highly appealing pharmaceutical properties. Monocyclic, spirocyclic, and bridged azetidines can be accessed by leveraging 1‐azabicyclo[1.1.0]butanes as precursors.
Yuri Gelato   +3 more
wiley   +1 more source

Quality properties Of Vietnamese cocoa liquors [PDF]

open access: yes, 2013
Vietnam (VN) is an emerging country targeting cocoa as a potential industrial domain. It is however still unclear how the quality of VN cocoa liquors can be positioned in the world cocoa supply.
Dewettinck, Koen   +6 more
core  

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