Results 31 to 40 of about 929 (177)

Azide‐to‐Diazo Transformation Facilitated by Michael Addition via Phosphazide Formation

Angewandte Chemie, Volume 138, Issue 23, 1 June 2026.
A new type of Michael addition based on azide‐to‐diazo conversion is disclosed. This unusual transformation proceeds via 1,4‐addition accompanied by N─N bond cleavage of phosphazide intermediates under practical conditions. The high versatility of the resulting Michael adducts enables the synthesis of a wide variety of organonitrogen compounds ...
Tomoki Mano, Takahiro Yasuda, Gaku Orimoto, Suguru Yoshida   +3 more
wiley   +2 more sources

SOCl2 catalyzed cyclization of chalcones: Synthesis and spectral studies of some bio-potent 1H pyrazoles

Bulletin of the Chemical Society of Ethiopia, 2014
Some aryl-aryl 1H pyrazoles have been synthesised by cyclization of aryl chalcones and hydrazine hydrate in the presence of SOCl2. The yields of the pyrazoles are more than 85%.
K. Ranganathan, R. Suresh, G. Vanangamudi, K. Thirumurthy, P. Mayavel, G. Thirunarayanan   +5 more
doaj   +1 more source

Synthesis of Some New Pyrazolines [PDF]

مجلة التربية والعلم, 2006
The present work includes the preparation of a series of substituted chalcones ( NO2 , Me , OMe , Cl ) and condensation of these chalcone with a series of prepared aromatic and aliphatic acid hydrazides in a basic medium to afford the new pyrazolines ...
A.J. AL-Hamdany, A.M. Hamdy
doaj   +1 more source

Synthesis of enones, pyrazolines and pyrrolines with gem-difluoroalkyl side chains

Beilstein Journal of Organic Chemistry, 2013
Starting from easily accessible gem-difluoropropargylic derivatives, a DBU-mediated isomerisation affords enones in fair yields with a gem-difluoroalkyl chain.
Assaad Nasr El Dine, Ali Khalaf, Danielle Grée, Olivier Tasseau, Fares Fares, Nada Jaber, Philippe Lesot, Ali Hachem, René Grée   +8 more
doaj   +1 more source

The Jekyll and Hyde Nature of Tetrazoles in Polymer Science: From Intrinsic Electronic Duality to Programmable Macromolecular Function

Angewandte Chemie International Edition, EarlyView.
Tetrazoles are reframed as substitution‐programmable heterocycles rather than static functional groups in polymer chemistry. By linking electronic identity to synthetic strategy and polymer architecture, this mini‐review establishes a design framework for translating tetrazole duality into predictable macromolecular function.
Meryem S. Akdemir, Hatice Mutlu
wiley   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Synthesis and Cytotoxic Evaluation of 3-(4-Fluorophenyl)-4,5-dihydro-5-(3,4,5-trimethoxy/4-nitrophenyl)-N-(substituted-phenyl)pyrazole-1-carboxamide Analogues

SynOpen, 2018
A novel series of 3-(4-fluorophenyl)-4,5-dihydro-5-(3,4,5-trimethoxy/4-nitro phenyl)-N-(substituted-phenyl)pyrazole-1-carboxamide analogues 4a–n was synthesized in two steps from 4-fluoroacetophenone.
Mohamed J. Ahsan, Bhawani S. Kumawat, Sonu Kumawat, Piush Sharma, Mohammad A. Bakht, Mohd Z. Hassan, Afzal Hussain, Pankaj Saraswat, Habibullah Khalilullah   +8 more
doaj   +1 more source

White light emitting molecular logic gates

Smart Molecules, EarlyView.
White light emitting smart molecules with Boolean logic computing ability are surveyed. Abstract White light emitting (WLE) materials are of considerable interest with commercial and societal applications in video displays and lighting devices. A characteristic property of WLE materials is the luminescence profile spanning from 380 to 700 nm.
Davide Benedetto Tiz, Massimo Catania, David C. Magri   +2 more
wiley   +1 more source

Pyrene‐linked heterocyclic pyrazoles: Synthesis, antimicrobial screening, and in silico molecular insights

Smart Molecules, EarlyView.
A series of novel pyrene‐linked heterocyclic pyrazoles were synthesized and structurally characterized. The compounds were evaluated for antimicrobial activity against selected bacterial and fungal strains, showing promising inhibitory effects. Molecular docking studies provided insights into binding interactions and structure–activity relationships ...
Dinkal V. Kasundra, Paresh N. Patel
wiley   +1 more source

A Study of Antioxidant Properties and a Pharmacokinetic Investigation of Chalcones and Pyrazolines

Orbital: The Electronic Journal of Chemistry
Antioxidant compounds are widely studied in the literature because they minimize oxidative damage in biological processes. In this context, chalcones and pyrazolines are considered prototype compounds for this purpose. This study describes the synthesis
André Luis Kerek, Larissa Kozan , Gabrielle Schamne Fonseca , Bianca Sartori dos Santos , Raphaela Pereira Guaringue , Larissa Sens, Barbara Celânia Fiorin   +6 more
doaj   +1 more source