Results 1 to 10 of about 4,159,820 (313)

Synthesis of random copolymers of 4-vinylpyridine with n-octadecyl acrylate/n-octadecyl methacrylate by metal-free ATRP

open access: yesVietnam Journal of Science, Technology and Engineering, 2022
Poly(4-vinylpyridine-r-n-octadecyl acrylate) and poly(4-vinylpyridine-r-n-octadecyl methacrylate) were successfully synthesised via atom transfer radical polymerization (ATRP) using 10-phenylphenothiazine as the photo-induced catalyst.
Loc Tan Nguyen   +3 more
doaj   +1 more source

Metal free photoinduced C(sp3)–H thioarylation [PDF]

open access: yes, 2022
C-H thioarylation of hydrocarbon building blocks is a highly desirable synthetic transformation attributed to its prevalence in various pharmaceuticals and organic functional materials.
GAURAV, PRAKASH   +3 more
core   +1 more source

2-Alkylation of 3-Alkyindoles With Unactivated Alkenes

open access: yesFrontiers in Chemistry, 2022
An acid-catalyzed 2-alkylation of indole molecules is developed. Only catalytic amount of the commercially available, inexpensive and traceless HI is used as the sole reaction promoter. 2,3-Disubstituted indole molecules bearing congested tertiary carbon
Xuling Pan, Qian Liu, Yingling Nong
doaj   +1 more source

Noble-Metal-Free Electrocatalysts for Water Splitting - Metal Chalcogenides [PDF]

open access: yes, 2022
1979In this chapter, key achievements in the usage of different types of metal chalcogenides containing sulfur, selenium, and tellurium are comprehensively summarized as efficient catalysts for water splitting.
Apfel, Ulf-Peter, Siegmund, Daniel
core   +1 more source

Aryl Methyl Ketones: Versatile Synthons in the Synthesis of Heterocyclic Compounds

open access: yesSynOpen, 2022
The synthesis of aromatic heterocycles has attracted substantial attention due to the abundance of these heterocycles in drug molecules, natural products, and other compounds of biological interest.
Shabber Mohammed   +2 more
doaj   +1 more source

Brønsted acid catalyzed remote C6 functionalization of 2,3-disubstituted indoles with β,γ-unsaturated α-ketoester

open access: yesFrontiers in Chemistry, 2022
Graphical ...
You-Ya Zhang   +3 more
doaj   +1 more source

The dehydrogenation of butane on metal-free graphene [PDF]

open access: yesJournal of Colloid and Interface Science, 2022
The dehydrogenation of alkane feedstock to produce alkenes is a significant and energy intensive industrial process, generally occurring on metals and metal oxides. Here, we investigate a catalytic mechanism for the dehydrogenation of butane on single-layer, metal-free graphene using a combination of ab initio quantum chemical calculations and ...
Brooks, A.   +4 more
openaire   +6 more sources

Nucleophilic C4-selective (hetero) arylation of pyridines for facile synthesis of heterobiaryls

open access: yesFrontiers in Chemistry, 2023
The synthesis of heterobiaryl compounds holds significant value in organic chemistry due to their extensive range of applications. Herein, we report a highly efficient strategy for conducting C4-selective (hetero) arylation of pyridines using N ...
Kewon Kim   +5 more
doaj   +1 more source

A Novel Stabilization of Skin Protein Using Replenishable Tanning Agents – Mineral-free Fragrant Garment Leathers

open access: yesJournal of Natural Fibers, 2022
Conventionally leathers are produced from chromium tanning which is toxic and difficult to dispose off the chromium containing wastes and products. However, to date there hasn’t been any replacement found for chromium as a preferred tanning agent for the
John Sundar, Kavati Phebe Aaron
doaj   +1 more source

Metal-Free Catalyzed Oxidation/Decarboxylative [3+2] Cycloaddition Sequences of 3-Formylchromones to Access Pyrroles with Anti-Cancer Activity

open access: yesMolecules, 2023
An efficient and direct approach to pyrroles was successfully developed by employing 3-formylchromones as decarboxylative coupling partners, and facilitated by microwave irradiation.
Xue Li   +6 more
doaj   +1 more source

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