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All published articles 212

Marine-Biomass-Derived Melanin–Chitosan Composites as Natural Black Hair Colorants: Charge Reversal and Electrostatic Deposition Mechanism

Toshihiko Matsuura & Airi Nakajima · Organics · 2026

Conventional oxidative hair dyes rely on aromatic amines, raising concerns about human health and environmental safety. This study reports a natural hair-coloring system using size-controlled ink particles (SIPs, ~170 nm in diameter) from cuttlefish ink and chitosan. Because both...

Open access Research Article 10.3390/org7020023

Synthesis, Molecular Structure and Crystal Packing Peculiarities of Some 5-Arylidene-3-phenylrhodanine Derivatives

Xiumei Bai, Danila R. Chernyavskiy, Anna D. Maksimova, Ilya A. Yakushev, Viktor A. Tafeenko, Elena K. Beloglazkina & Alexander V. Finko · Organics · 2026

We report the synthesis and single-crystal X-ray structures of three novel (Z)-5-arylidene-3-phenylrhodanine derivatives, differing in the substituents on the benzylidene fragment (two methoxy groups (compound I), a dioxine ring (compound II), or a dioxole ring (compound III)). D...

Open access Research Article 10.3390/org7020024

Palladium-Catalyzed Enantiospecific Three-Component Reaction for the Synthesis of 1,2,4-Trisubstituted Homoallylic Alcohols

Ayumu Natsubori, Momoka Ikeda, Yushin Hosokawa, Mizuki Akagawa & Yoshikazu Horino · Organics · 2026

1,2,4-Trisubstituted chiral homoallylic alcohols are valuable intermediates in natural product synthesis and complex molecular architectures; however, their catalytic asymmetric synthesis remains challenging due to the need for precise control of regioselectivity, diastereoselect...

Open access Research Article 10.3390/org7020022

Adsorption and Electronic Structure of Imidazole-Based Inhibitors on Fe(100): A Combined DFT and DFTB Study

Andrea Navarrete-Mosquera, Juan Pedro Palomares-Báez, Rody Soto-Rojo, Tomás Delgado-Montiel, Samuel Soto-Acosta, Nora Aydee Sánchez-Bojorge, Daniel Glossman-Mitnik & Jesús Baldenebro-López · Organics · 2026

This study presents a theoretical investigation of the adsorption and electronic structure of two imidazole derivatives, 4-(1,4,5-triphenylimidazol-2-yl)-aniline (M1) and N,N-dimethyl-4-(1,4,5-triphenylimidazol-2-yl)-aniline (M2), on an Fe(100) surface. A combined computational a...

Open access Research Article 10.3390/org7020021

Design, Synthesis, and Drug-Likeness Assessment of Azole-Functionalized Hydrazone Derivatives: Towards Antimicrobial Activity

Juozas Kiltinavičius, Kristina Kantminienė, Ilona Jonuškienė & Ingrida Tumosienė · Organics · 2026

Reaction of 5-oxo-1-(4-(phenylamino)phenyl)pyrrolidine-3-carbohydrazide with selected aldehydes and ketone provided novel hydrazone derivatives bearing azole moieties: pyrazole, pyrrole, and indole. The drug likeness of the newly synthesized compounds and their physicochemical ch...

Open access Research Article 10.3390/org7020020

Integrated In Silico and Chromatographic Evaluation of the Biological Properties of Novel Bis-Substituted Thiocarbohydrazone Derivatives

Suzana Apostolov, Dragana Mekić, Gorana Mrđan & Gyöngyi Vastag · Organics · 2026

Thiocarbohydrazone derivatives represent a highly significant class in medicinal chemistry, characterized by a versatile scaffold defined with a thiocarbonyl (C=S) core and one or two imine (–C=N–) functionalities, allowing for precise modulation of their physicochemical and biol...

Open access Research Article 10.3390/org7020019

Synthesis of 23,23-Difluoro-24-nor- and 24′,24′-Difluoro-24-Homovitamin D3 Analogues and Unexpected Structure-Activity Relationships

Fumihiro Kawagoe, Hiroya Tabuchi, Taiyo Ideguchi, Yuki Okamoto, Souma Murata, Tomofumi Yatsu, Syota Yamada, Kaori Yasuda, Yusuke Akagi, Masashi Takano, Toshie Fujishima, Yoshiki Miyata, Ken’ichi Aoki, Toshiyuki Sakaki & Atsushi Kittaka · Organics · 2026

We synthesized two vitamin D3 analogues, 3 and 4, which have a shortened or elongated fluoro-side-chain based on 24,24-difluoro-25-hydroxyvitamin D3 (5) using an efficient convergent approach and studied their preliminary biological activity. Both analogues exhibited greater resi...

Open access Research Article 10.3390/org7020018

Revised Formal Total Synthesis of Dehydro-δ-Viniferin and Anigopreissin A

Alessandro Santarsiere, Marianna Volgare & Lucia Chiummiento · Organics · 2026

This work presents a revised total synthesis of two pharmacologically relevant benzofurans using newly developed environmentally friendly methodologies. In particular, we focused on establishing improved synthetic routes to stilbene dimers under milder and more sustainable reacti...

Open access Research Article 10.3390/org7020017

Recent Developments in Chemical Synthesis and Biological Activities of Aloe-Emodin Derivatives

Jeltzlin Semerel, Nigel John, Pedro Fardim & Wim Dehaen · Organics · 2026

Aloe-emodin is an anthraquinone with a wide range of medicinal applications, including anti-angiogenic, anticancer, antimicrobial, antiviral, anti-inflammatory, and antioxidant activities. In this review, the functionalization of aloe-emodin using various synthetic methods, inclu...

Open access Research Article 10.3390/org7020016

Synthesis, Characterization, and Multidimensional In Silico Evaluation of Novel Etodolac-Based 1,3,4-Oxadiazole Derivatives as Potential Anticancer Agents

Tiba M. Hameed, Rafid M. Hashim, S. J. Abed, Raneen Hashim Ridha & O. Al-Mohammed Baqer · Organics · 2026

A new series of eight novel etodolac-based 1,3,4-oxadiazoles was synthesized, characterized, and tested in silico in multidimensional routes, starting with etodolac, a well-known nonsteroidal anti-inflammatory medication (NSAID). In silico studies were performed prior to synthesi...

Open access Research Article 10.3390/org7020015

Salophen-Type Ni(II) Schiff Base Complexes Derived from Naphthalene Aldehydes and Their Application as Catalysts for the Methanol Electro-Oxidation Reaction

Fabiola Hernández-García, Emanuel Pérez-Martínez, Raúl Colorado-Peralta, Jesús Antonio Cruz-Navarro & David Morales-Morales · Organics · 2026

Salophen-type Schiff base ligands derived from salicylaldehyde and naphthalene aldehydes were synthesized and coordinated to Ni(II) to obtain three nickel complexes (NiL1–NiL3), which were evaluated as heterogeneous electrocatalysts for the methanol electro-oxidation reaction (MO...

Open access Research Article 10.3390/org7010014

Frontier Orbitals and Charges Approaches in Electrophilic Aromatic Substitution: The Cases of Anisole and Benzaldehyde

Lucia Emanuele, Rocco Racioppi & Maurizio D’Auria · Organics · 2026

The study aimed to verify the possible use of DFT calculation in the prediction of the orientation in electrophilic aromatic substitution. An activated ortho/para orienting substrate, and a deactivated meta orienting substrate, were used in DFT calculations using B3LYP, B3PW91, B...

Open access Research Article 10.3390/org7010013

Synthesis and Evaluation of Cytotoxic Activity of 2-Aryl-2-(3-Indolyl)Propionic Acid Derivatives

Alexander V. Aksenov, Nicolai A. Aksenov, Nikolai A. Arutiunov, Dmitrii A. Aksenov, Anna M. Zatsepilina, Daria I. Murashkina, Maksim O. Shcheglov & Sergei N. Ovcharov · Organics · 2026

2-Aryl-2-(3-indolyl)acetohydroxamic acids have emerged as promising antitumor agents; however, their poor pharmacokinetic profile remains a significant drawback. To address this limitation, we have synthesized a homolog of such acids—specifically 2-aryl-2-(3-indolyl)propionic aci...

Open access Research Article 10.3390/org7010011

Linear Stepwise Synthesis of 2-(Naphthalen-1-yl)-2,3,5,6-tetrahydro-1H-isoquinolino[8,1,2-hij]quinazoline: A Novel Fused Heteroaromatic Framework

Augusto Rivera, Álvaro Castillo, Jaime Ríos-Motta & Diego Quiroga · Organics · 2026

In the present work, we describe the synthesis of a new heterocyclic derivative, 2-(naphthalen-1-yl)-2,3,5,6-tetrahydro-1H-isoquinolino[8,1,2-hij]quinazoline 1, using the reaction between the aminal 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane 2 (TATD) and 1-naphthylamine 3 as th...

Open access Research Article 10.3390/org7010012

Systematic Investigation of the Solvation Structure in THF-Based Localized High-Concentration Electrolytes

Yoonha Hwang, Yeo Jin An, Soohyun Sim & Minjeong Shin · Organics · 2026

Understanding Li+ solvation structure is critical for the rational design of high- and localized high-concentration electrolytes. Here, we present a systematic investigation of tetrahydrofuran (THF)-based electrolytes with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) using...

Open access Research Article 10.3390/org7010010