Results 41 to 50 of about 4,154 (224)

Electrochemically enabled oxidative aromatization of pyrazolines

Organic & Biomolecular Chemistry, 2023
Electrochemical oxidation of pyrazolines mediated by ubiquitous sodium chloride readily enables access to a broad variety of pyrazoles in a sustainable manner.
Silja Hofmann, Martin Linden, Julian Neuner, Felix N. Weber, Siegfried R. Waldvogel   +4 more
openaire   +4 more sources

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

Preparation of New 2,3-Diphenylpropenoic Acid Esters – Good Yields Even for the More Hindered Z Isomers [PDF]

, 2004
The potassium salt of E- and Z-2,3-diphenylpropenoic acids prepared in situ could be esterified efficiently in DMSO with the appropriate alkyl halides at room temperature.
Barry, Bergens, Fischer, István Pálinkó, Károly Felföldi, Lee, László Boros, Ogliaruso   +7 more
core   +2 more sources

Design, Synthesis, and Anti-mycobacterial Evaluation of New 3,5-Disubstituted-pyrazole-1-carbothioamides

Indonesian Journal of Chemistry, 2022
Two series of new 3,5-disubstituted-pyrazole-1-carbothioamides (4a-f and 5a-e) were designed and synthesized through condensation reaction between chalcones and thiosemicarbazides under alkaline condition via cyclocondensation reaction.
Kok Tong Wong, Hasnah Osman, Thaigarajan Parumasivam, Muhammad Solehin Abd Ghani, Mohd. Zaheen Hassan, Unang Supratman, Mohamad Nurul Azmi Mohamad Taib   +6 more
doaj   +1 more source

(E)-(1-(4-Ethoxycarbonylphenyl)-5-(3,4-dimethoxyphenyl)-3-(3,4-dimethoxystyryl)-2-pyrazoline: Synthesis, Characterization, DNA-Interaction, and Evaluation of Activity Against Drug-Resistant Cell Lines

Molbank, 2020
(E)-1-(4-Ethoxycarbonylphenyl)-5-(3,4-dimethoxyphenyl)-3-(3,4-dimethoxystyryl)-2-pyrazoline was synthesized via the cyclization reaction between the monocarbonyl curcuminoid (2E,6E)-2,6-bis(3,4-dimethoxybenzylidene)acetone and ethyl hydrazinobenzoate in ...
Dimitris Matiadis, Barbara Mavroidi, Angeliki Panagiotopoulou, Constantinos Methenitis, Maria Pelecanou, Marina Sagnou   +5 more
doaj   +1 more source

Komplexchemie perhalogenierter Cyclopentadiene und Alkine, VII [PDF]

, 1990
Coordination Chemistry of Perhalogenated Cyclopentadienes and Alkynes, VII1). - Synthesis of Several Tetrachlorometalloles of Cobalt, Rhodium, and Iridium; Structure of a Iridacyclopentadiene Derivative The reaction of dichloroethyne with CpCo(PPh3)2 ...
Clarke, Collman, Collman, Fehlhammer, Maguc, Mague, Mague, O'Connnor, Otsuka, Ott, Pielichowsky, Schore, Sheldrick, Sünkel, Sünkel, Wakatsuki   +15 more
core   +2 more sources

Synthesis of New Pyrazolines Derivatives from Coumarine Compounds [PDF]

مجلة التربية والعلم, 1999
The present work includes preparation of series of chalcones and condensation of these chalcones with a series of prepared coumarin hydrazides in acidic medium to afford the new pyrazolines.
W. Gh-Bedewy, O. Salih, A. Ahmad
doaj   +1 more source

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

Angewandte Chemie International Edition, EarlyView.
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   +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

λ5-Phosphorus-Containing α-Diazo Compounds (PCDCs): a valuable tool for accessing phosphorus-functionalized molecules [PDF]

, 2016
The compounds characterized by the presence of a λ5-phosphorus functionality at the α-position with respect to the diazo moiety, here referred to as λ5-phosphorus-containing α-diazo compounds (PCDCs), represent a vast class of extremely versatile ...
Marinozzi, Maura, Pertusati, Fabrizio, Serpi, Michaela   +2 more
core   +2 more sources