Results 41 to 50 of about 140,419 (292)
Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition
Molecules, 2015 An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is ...
Wen-Chang Chen +8 more
doaj +1 more source
Molecules, 2021 Diabetes mellitus is a major health problem globally. The management of carbohydrate digestion provides an alternative treatment. Flavonoids constitute the largest group of polyphenolic compounds, produced by plants widely consumed as food and/or used ...
Faisal K. Algethami +6 more
doaj +1 more source
Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]
, 2017 Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels-Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides ...
Abbasov, Mikail E +3 more
core +2 more sources
Spatial Separation of the Conformers of Methyl Vinyl Ketone [PDF]
J. Phys. Chem. A 2020, 2020 Methyl vinyl ketone (C$_4$H$_6$O) is a volatile, labile organic compound of importance in atmospheric chemistry. We prepared a molecular beam of methyl vinyl ketone with a rotational temperature of 1.2(2)~K and demonstrated the spatial separation of the \emph{s-cis} and \emph{s-trans} conformers of methyl vinyl ketone using the electrostatic deflector.
arxiv +1 more source
Synthesis of 4-Arylselanyl-1H-1,2,3-triazoles from Selenium-Containing Carbinols
Molecules, 2021 In this work, we present a simple way to achieve 4-arylselanyl-1H-1,2,3-triazoles from selenium-containing carbinols in a one-pot strategy. The selenium-containing carbinols were used as starting materials to produce a range of selanyl-triazoles in ...
Francesca Begini +6 more
doaj +1 more source
Thermo‐responsive topological metamorphosis in covalent‐and‐supramolecular polymer architectures
Aggregate, Volume 3, Issue 6, December 2022., 2022 We report a thermo‐responsive topological metamorphosis in covalent‐and‐supramolecular polymer (CSP) architectures wherein supramolecular graft polymer (SGP) transforms into supramolecular polymer network (SPN) based on collaborative dynamic covalent bond chemistry and host−guest chemistry.
Yongming Wang +7 more
wiley +1 more source
Reaction profiles for quantum chemistry-computed [3 + 2] cycloaddition reactions [PDF]
arXiv, 2022 Bio-orthogonal click chemistry based on [3 + 2] dipolar cycloadditions has had a profound impact on the field of biochemistry and significant effort has been devoted to identify promising new candidate reactions for this purpose. To gauge whether a prospective reaction could be a suitable bio-orthogonal click reaction, information about both on- and ...
arxiv
Molecules, 2021 Short and efficient syntheses of functionalized (pyrrolidin-2-yl)phosphonate and (5-oxopyrrolidin-2-yl)phosphonate have been developed. The synthetic strategy involved the diastereospecific 1,3-dipolar cycloaddition of N-benzyl-C-(diethoxyphosphoryl ...
Iwona E. Głowacka +3 more
doaj +1 more source
Cavity Click Chemistry: Cavity-Catalyzed Azide-Alkyne Cycloaddition [PDF]
arXiv, 2023 Click chemistry, which refers to chemical reactions that are fast, selective, and with high product yields, has become a powerful approach in organic synthesis and chemical biology. Due to the cytotoxicity of the transition metals employed in click chemistry reactions, a search for novel metal-free alternatives continues.
arxiv
Enhanced Sampling for Free Energy Profiles with Post-Transition-State Bifurcations [PDF]
, 2022 We present a method to explore the free energy landscapes of chemical reactions with post-transition-state bifurcations using an enhanced sampling method based on well-tempered metadynamics. Obviating the need for computationally expensive DFT-level ab initio molecular dynamics simulations, we obtain accurate energetics by utilizing a free energy ...
arxiv +1 more source