Results 51 to 60 of about 11,578 (241)

Natural and Synthetic Halogenated Amino Acids—Structural and Bioactive Features in Antimicrobial Peptides and Peptidomimetics

open access: yesMolecules, 2021
The 3D structure and surface characteristics of proteins and peptides are crucial for interactions with receptors or ligands and can be modified to some extent to modulate their biological roles and pharmacological activities. The introduction of halogen
Mario Mardirossian   +7 more
doaj   +1 more source

Amine and Titanium (IV) Chloride, Boron (III) Chloride or Zirconium (IV) Chloride-Promoted Baylis-Hillman Reactions

open access: yesMolecules, 2001
The Baylis-Hillman reactions of various aryl aldehydes with methyl vinyl ketone at temperatures below -20oC using Lewis acids such as titanium (IV) chloride, boron (III) chloride or zirconium (IV) chloride in the presence of a catalytic amount of ...
Shi-Cong Cui, Jian-Kang Jiang, Min Shi
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

Halogenation of polypnictogen ligand complexes [PDF]

open access: yes, 2023
After that a previous investigation from our group demonstrated that the iodination and the “classical” oxidation of En ligand complexes can afford different results and are therefore being considered as complementary tools for the synthesis of new ...
Garbagnati, Anna
core   +1 more source

Late‐Stage Functionalization of Peptides on the Solid Phase

open access: yesAngewandte Chemie International Edition, EarlyView.
Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner   +2 more
wiley   +1 more source

Decarbonylative Halogenation by a Vanadium Complex

open access: yes, 2016
Metal-catalyzed halogenation of the C–H bond and decarbonylation of aldehyde are conventionally done in nature. However, metal-mediated decarbonylative halogenation is unknown.
Rameezul Haque (1980220)   +3 more
core   +1 more source

Amine Directed Palladium Catalyzed C‐H Halogenation of Phenylalanine Derivatives

open access: yes, 2021
International audienceAn efficient primary amine-directed palladium catalyzed C-H halogenation (X = I, Br, Cl) of phenylalanine derivatives is reported on a range of quaternary amino acid (AA) derivatives thanks to suited conditions employing ...
Coufourier, Sébastien   +7 more
core   +1 more source

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

open access: yesChemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve   +4 more
wiley   +1 more source

Halogenation. Part I. Iodination.

open access: yes, 1926
Halogenation.
DATTATREYA ANANT KULKARNI   +1 more
core   +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

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