Results 11 to 20 of about 2,874,801 (150)

Cannabidiol as the Substrate in Acid-Catalyzed Intramolecular Cyclization

open access: yesJournal of Natural Products, 2020
The chemical reactivity of cannabidiol is based on its ability to undergo intramolecular cyclization driven by the addition of a phenolic group to one of its two double bonds.
Paola Marzullo   +7 more
semanticscholar   +1 more source

Photoexcitation of flavoenzymes enables a stereoselective radical cyclization

open access: yesScience, 2019
Light teaches (co)enzymes new tricks Light is widely used in organic synthesis to excite electrons in a substrate or catalyst, opening up reactive pathways to a desired product.
Kyle F. Biegasiewicz   +9 more
semanticscholar   +1 more source

Oxidative Cyclization in Natural Product Biosynthesis.

open access: yesChemical Reviews, 2017
Oxidative cyclizations are important transformations that occur widely during natural product biosynthesis. The transformations from acyclic precursors to cyclized products can afford morphed scaffolds, structural rigidity, and biological activities ...
Mancheng Tang   +4 more
semanticscholar   +1 more source

Asymmetric Redox-Neutral Radical Cyclization Catalyzed by Flavin-Dependent ‘Ene’-Reductases

open access: yesNature Chemistry, 2019
Flavin-dependent ‘ene’-reductases (EREDs) are exquisite catalysts for effecting stereoselective reductions. Although these reactions typically proceed through a hydride transfer mechanism, we recently found that EREDs can also catalyse reductive ...
M. Black   +6 more
semanticscholar   +1 more source

Chemoselective Peptide Cyclization and Bicyclization Directly on Unprotected Peptides.

open access: yesJournal of the American Chemical Society, 2019
Cyclic peptides are drawing wide attentions as potential medium-sized modulators of biomolecular interactions with large binding surfaces. Simple but effective peptide cyclization methods are needed to construct cyclic peptide libraries by both peptide ...
Yue Zhang   +3 more
semanticscholar   +1 more source

Synthesis and investigation on optical and electrochemical properties of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridines

open access: yesBeilstein Journal of Organic Chemistry, 2021
A facile synthesis of 2,4-diaryl-9-chloro-5,6,7,8-tetrahydroacridine derivatives is reported which is based on POCl3-mediated cyclodehydration followed by double Suzuki–Miyaura cross-coupling.
Najeh Tka   +4 more
doaj   +1 more source

Enzymatic Bromocyclization of α‐ and γ‐Allenols by Chloroperoxidase from Curvularia inaequalis

open access: yesChemistryOpen, 2022
Vanadate‐dependent chloroperoxidase from Curvularia inaequalis catalyzes 5‐endo‐trig bromocyclizations of α‐allenols to produce valuable halofunctionalized furans as versatile synthetic building blocks. In contrast to other haloperoxidases, also the more
Janne M. Naapuri   +3 more
doaj   +1 more source

Enantioselective Radical Cyclization for Construction of 5-Membered Ring Structures by Metalloradical C-H Alkylation.

open access: yesJournal of the American Chemical Society, 2018
Radical cyclization represents a powerful strategy for construction of ring structures. Traditional radical cyclization, which is based on radical addition as the key step, necessitates the use of unsaturated substrates.
Yong Wang, X. Wen, X. Cui, X. Zhang
semanticscholar   +1 more source

Changing the topology of protein backbone: the effect of backbone cyclization on the structure and dynamics of a SH3 domain

open access: yesFrontiers in Chemistry, 2015
Understanding of the effects of the backbone cyclization on the structure and dynamics of a protein is essential for using protein topology engineering to alter protein stability and function.
Frank H Schumann   +6 more
doaj   +1 more source

Anodic Cyclization Reactions and the Mechanistic Strategies That Enable Optimization.

open access: yesAccounts of Chemical Research, 2017
Oxidation reactions are powerful tools for synthesis because they allow us to reverse the polarity of electron-rich functional groups, generate highly reactive intermediates, and increase the functionality of molecules.
Ruozhu Feng, Jake A. Smith, K. Moeller
semanticscholar   +1 more source

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