Formal α-trifluoromethylthiolation of carboxylic acid derivatives via N-acyl pyrazoles

2020 ◽  
Vol 56 (20) ◽  
pp. 3073-3076 ◽  
Author(s):  
Francesca Franco ◽  
Sara Meninno ◽  
Maurizio Benaglia ◽  
Alessandra Lattanzi
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
One Pot ◽  
Metal Free

A direct and general one-pot approach to α-trifluoromethylthiolated amides, esters and carboxylic acids has been successfully developed under mild, catalytic and metal-free conditions.

Synthesis of 3-(Cyclohexylamino)-2-arylimidazo[1,2-a]pyridine-8- carboxylic Acids Via an Efficient Three-component Condensation Reaction between Cyclohexylisocyanide and 2-Aminopyridine-3-carboxylic Acid in the Presence of Aromatic Aldehyde

2018 ◽  
Vol 21 (4) ◽  
pp. 298-301 ◽  
Author(s):  
Ghasem Marandi
Keyword(s):  
Biological Sciences ◽  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
High Performance ◽  
Condensation Reaction ◽  
Aromatic Aldehydes ◽  
New Materials ◽  
One Pot ◽  
High Yields ◽  
Benzaldehyde Derivatives

Aim and Objective: The reaction of cyclohexylisocyanide and 2-aminopyridine-3- carboxylic acid in the presence of benzaldehyde derivatives in ethanol led to 3-(cyclohexylamino)-2- arylimidazo[1,2-a]pyridine-8-carboxylic acids in high yields. In a three component condensation reaction, isocyanide reacts with 2-aminopyridine-3-carboxylic acid and aromatic aldehydes without any prior activation. Material and Methods: The synthesized products have stable structures which have been characterized by IR, 1H, 13C and Mass spectroscopy as well as CHN-O analysis. Results: In continuation of our attempts to develop simple one-pot routes for the synthesis of 3- (cyclohexylamino)-2-arylimidazo[1,2-a]pyridine-8-carboxylic acids, aromatic aldehydes with divers substituted show a high performance. Conclusion: In conclusion, this study introduces the art of combinatorial chemistry using a simple one-pot procedure for the synthesis of new materials which are interesting compounds in medicinal and biological sciences.

scholarly journals Efficient one-pot, four-component synthesis of N,N-dibenzyl-N-{1-[5-(3-aryl)-1,3,4-oxadiazol-2-yl]cyclobutyl}amine derivatives from the reaction of (isocyanoimino)triphenylphosphorane, dibenzylamine, an aromatic carboxylic acid and cyclobutanone

2012 ◽  
Vol 77 (9) ◽  
pp. 1175-1180 ◽  
Author(s):  
Nahid Shajari ◽  
Reza Kazemizadeh ◽  
Ali Ramazani
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aromatic Carboxylic Acid ◽  
One Pot ◽  
Aromatic Carboxylic Acids ◽  
High Yields ◽  
Neutral Conditions

Four-component reaction of cyclobutanone, dibenzylamine and (Nisocyanimino) triphenylphosphorane in the presence of aromatic carboxylic acids proceed smoothly at room temperature and under neutral conditions to afford N,N-dibenzyl-N-{1-[5-(3-aryl)-1,3,4-oxadiazol-2-yl]cyclobutyl}amine derivatives in high yields.

scholarly journals Stereoselective Palladium-Catalyzed C(sp3)–H Mono-Arylation of Piperidines and Tetrahydropyrans with a C(4) Directing Group

2021 ◽  
Author(s):  
Amalia-Sofia Piticari ◽  
Daniele Antermite ◽  
Joe I. Higham ◽  
J. Harry Moore ◽  
Matthew P. Webster ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Functional Groups ◽  
One Pot ◽  
Palladium Catalyzed ◽  
Directing Group

A selective Pd-catalyzed C(3)–H cis-functionalization of piperidine and tetrahydropyran carboxylic acids is achieved using a C(4) aminoquinoline amide auxiliary. High mono- and cis-selectivity is attained by using mesityl carboxylic acid as an additive. Conditions are developed with significantly lower reaction temperatures (≤50 °C) than other reported heterocycle C(sp3)–H functionalization reactions, which is facilitated by a DoE optimization. A one-pot C–H functionalization-epimerization procedure provides the trans-3,4-disubstituted isomers directly. Divergent aminoquinoline removal is accomplished with the installation of carboxylic acid, alcohol, amide and nitrile functional groups. Overall fragment compounds suitable for screening are generated in 3–4 steps from readily-available heterocyclic carboxylic acids.

Stable carboxylic acid derivatized alkoxy silanes

2015 ◽  
Vol 51 (12) ◽  
pp. 2339-2341 ◽  
Author(s):  
A. Feinle ◽  
S. Flaig ◽  
M. Puchberger ◽  
U. Schubert ◽  
N. Hüsing
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
One Pot ◽  
Hydrosilylation Reaction ◽  
Unsaturated Carboxylic Acids ◽  
Organofunctional Silanes ◽  
Alkoxy Groups

A convenient and straightforward one-pot hydrosilylation reaction of different unsaturated carboxylic acids with trialkoxysilanes in the presence of catalytic amounts of platinum(iv) dioxide resulted in excellent yields in organofunctional silanes combining carboxy- and alkoxy groups within one molecule.

Eu2O3 modified CeO2 nanoparticles as a heterogeneous catalyst for an efficient green multicomponent synthesis of novel phenyldiazenyl-acridinedione-carboxylic acid derivatives in aqueous medium

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91133-91140 ◽  
Author(s):  
P. Sagar Vijay Kumar ◽  
L. Suresh ◽  
T. Vinodkumar ◽  
G. V. P. Chandramouli
Keyword(s):  
Carboxylic Acid ◽  
Aqueous Medium ◽  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Ceo2 Nanoparticles ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Dicarbonyl Compounds ◽  
Multicomponent Coupling

Synthesis of phenyldiazenyl-acridinedione-carboxylic acids by a one-pot multicomponent coupling of 1,3-dicarbonyl compounds, substituted-phenyl-diazenyl-benzaldehydes and glycine using Eu2O3 modified CeO2 as the catalyst in aqueous medium.

A metal-free tandem approach to prepare structurally diverse N-heterocycles: synthesis of 1,2,4-oxadiazoles and pyrimidinones

2014 ◽  
Vol 38 (7) ◽  
pp. 3062-3070 ◽  
Author(s):  
Puneet K. Gupta ◽  
Mohd. Kamil Hussain ◽  
Mohd. Asad ◽  
Ruchir Kant ◽  
Rohit Mahar ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
One Pot ◽  
Metal Free

N-heterocycles, namely 1,2,4-oxadiazoles and 2,6 disubstituted pyrimidin-4-ones, have been synthesised in one pot via carboxamidation of amidines with aryl carboxylic acids and aryl propargylic acids under metal-free conditions.

One-Pot Transition-Metal-Free Synthesis of Weinreb Amides Directly from Carboxylic Acids

Synthesis ◽  
2013 ◽  
Vol 46 (03) ◽  
pp. 320-330 ◽  
Author(s):  
Danfeng Huang ◽  
Yulai Hu ◽  
Teng Niu ◽  
Ke-Hu Wang ◽  
Changming Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Carboxylic Acids ◽  
One Pot ◽  
Metal Free ◽  
Weinreb Amides

An Efficient Acid- and Metal-Free One-Pot Synthesis of Benzothiazoles from Carboxylic Acids.

ChemInform ◽  
2006 ◽  
Vol 37 (7) ◽  
Author(s):  
Santosh Rudrawar ◽  
Atul Kondaskar ◽  
Asit K. Chakraborti
Keyword(s):  
Carboxylic Acids ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis
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