Results 81 to 90 of about 1,953 (199)

Design, Synthesis, Photophysical, Theoretical, and Electrochemical Characterization of Novel Organochalcogen‐DHPM‐Triazole Hybrids

ChemistrySelect, Volume 10, Issue 22, June 11, 2025.
A library of novel organochalcogen‐DHPM‐triazole hybrids was developed using a rapid, simple, and ultrasound‐assisted method. Additionally, all compounds underwent comprehensive theoretical, photophysical, and electrochemical characterization, providing relevant insights for future biological applications.
Amanda R. Azevedo, Patrick C. Nobre, Mateus H. Köhler, Bernardo A. Iglesias, Vanessa Nascimento   +4 more
wiley   +1 more source

Multicomponent Biginelli's synthesis of 3,4-dihydropyrimidin-2(1H)-ones promoted by SnCl2.2H2O

Journal of the Brazilian Chemical Society, 2004
The ability of SnCl2.2H2O as catalyst to promote the Biginelli three-component condensation reaction from a diversity of aromatic aldehydes, ethyl acetoacetate and urea or thiourea is described.
Russowsky Dennis, Lopes Fabrício A., Silva Victor S. S. da, Canto Karen F. S., D'Oca Marcelo G. Montes, Godoi Marla N.   +5 more
doaj  

Solvent free one pot synthesis of novel naphtho[1,8-gh] quinazoline-7,10-dione derivatives with CuCl2

Bulletin of the Chemical Society of Ethiopia, 2018
The Biginelli-type reaction of phenalen-1,3-dione with urea, and benzaldehyde derivatives in the presence of CuCl2 as a catalyst for the synthesis of naphtho[1,8-gh]quinazoline-7,10-diones in solvent free condition are reviewed.
M. K. Mohammadi
doaj   +1 more source

Sustainable Biginelli chemistry: Indian contributions to green multicomponent synthesis

Discover Chemistry
The Biginelli Reaction is a one-pot acid-catalysed cyclo-condensation procedure that combines urea, β-ketoester, and aromatic aldehydes to create functionalised DHPMs. For more than a century, this three-component reaction has been recognised as a method
Rajni, Sahil, Neera Raghav, Anjaneyulu Bendi, G. B. Dharma Rao   +4 more
doaj   +1 more source

Synthesis of bioactive heterocycles using reusable heterogeneous catalyst HClO4–SiO2 under solvent-free conditions

Green Chemistry Letters and Reviews, 2018
We are reporting a simple, efficient and green protocol for the synthesis of chromenes and dihydropyrimidines (products of Knoevenagel and Biginelli reaction, respectively) by the use of silica-supported perchloric acid (HClO4–SiO2) as an effective ...
Leimajam Vartima Chanu, Thokchom Prasanta Singh, Laishram Ronibala Devi, Okram Mukherjee Singh   +3 more
doaj   +1 more source

Highly Efficient Synthesis of Substituted 3,4-Dihydropyrimidin-2-(1H)-ones (DHPMs) Catalyzed by Hf(OTf)₄: Mechanistic Insights into Reaction Pathways under Metal Lewis Acid Catalysis and Solvent-Free Conditions

Molecules, 2019
In our studies on the catalytic activity of Group IVB transition metal Lewis acids, Hf(OTf)4 was identified as a highly potent catalyst for „one-pot, three-component„ Biginelli reaction.
Rui Kong, Shuai-Bo Han, Jing-Ying Wei, Xiao-Chong Peng, Zhen-Biao Xie, Shan-Shan Gong, Qi Sun   +6 more
doaj   +1 more source

MICROWAVE IRRADIATED GREEN BIGINELLI REACTION†EMPLOYING APPLE, POMEGRANATE AND GRAPE JUICE AS ECO-FRIENDLY REACTION MEDIUM [PDF]

, 2016
Objective: The main objective of this work is to explore the utility of apple, pomegranate and grape juice as an eco-friendly reaction medium for microwave assisted green Biginelli reaction.Methods: A series of Biginelli reactions were carried out in ...
Padan, Simarjit Kaur, Pramanik, Tanay
core   +1 more source

Pivalic acid assisted Biginelli reaction for synthesis of dihydropyrimidinones and dihydrothiopyrimidinones [PDF]

, 2020
677-681Herein is provided an alternate, simple, multigram scale, efficient route for Biginelli reaction for synthesis of dihydropyrimidinones using urea, ethylacetatoacetate, and benzaldehyde with pivalic ...
Mhaldar, Shashank N, Chodankar, Anika Arjun, Gawas, Anushri Laxman, Anvekar, Tushar S, Salgaonkar, Lalitprabha N, Vernekar, Shruti Sagun, Vaz, Teotone, Kadam, Hari K, Gaonkar, Saurabh Sudan   +8 more
core  

Biginelli reaction catalyzed by ‘Ionic liquid- ethylene glycol’ protected copper nanoparticles at room temperature^a. [PDF]

, 2012
Biginelli reaction catalyzed by ‘Ionic liquid- ethylene glycol’ protected copper nanoparticles at room temperaturea.
Subho Mozumdar (141584), Amit Saxena (76487), Ajeet Kumar (141578), Arnab De (141581), Manika Dewan (141577)   +4 more
core   +1 more source

Methyl 6-Methyl-1-(4-methylphenyl)-2-oxo-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carboxylate

Molbank, 2012
Methyl 6-methyl-1-(4-methylphenyl)-2-oxo-4-phenyl-1,2,3,4-tetrahydro-pyrimidine-5-carboxylate has been synthesized via the modified Biginelli reaction from benzaldehyde, p-tolylurea, and methyl acetoacetate, promoted with microwave irradiation and ...
Haiping Wang, Qing Chen, Qingjian Liu
doaj   +1 more source