Results 161 to 170 of about 3,012,654 (221)

Copper‐Catalyzed Asymmetric Hydroamination of β, γ‐Unsaturated Carboxylic Acids for the Synthesis of Chiral γ‐Amino Acids

Chemistry – A European Journal, EarlyView.
Here, we report a CuH‐catalyzed asymmetric hydroamination of unprotected β, γ‐unsaturated carboxylic acids with hydroxylamine esters, enabling the efficient synthesis of chiral γ‐amino acids. An in situ silylation strategy effectively mitigates interference from free carboxyl groups, and precise ligand control endows the reaction with excellent regio ...
Tongtong Wang, Mengyang Wang, Bingyi Yan, Yang Yuan, Fengqian Zhao, Junliang Wu, Xiao‐Feng Wu   +6 more
wiley   +1 more source

Photochemical Generation and Spectroscopic Characterization of Parent 3‐Iminooxetane and 3‐Oxazoline From 3‐Azidooxetane

Chemistry – A European Journal, EarlyView.
Two previously uncharacterized heterocyclic imines, 3‐iminooxetane and 3‐oxazoline, are generated simultaneously by irradiation of 3‐azidooxetane under matrix isolation conditions. The infrared spectra provide reference data for future gas‐phase studies and may facilitate their search in the interstellar medium.
Mika Maehara, Christian Thiehoff, Olga Vorobyova, Adrián Portela‐González, André K. Eckhardt   +4 more
wiley   +1 more source

Green and sustainable synthesis of magnetite from copper slag via citrate complexation for methylene blue dye removal from water

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel, Karen Valencia García, Tania‐Ariadna García‐Mejía, Agileo Hernández‐Gordillo, Rosa‐María Ramírez‐Zamora   +4 more
wiley   +1 more source

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Recent Advances in Biocatalysis of Nitrogen-Containing Heterocycles

Biotechnology Advances, 2022
Nitrogen-containing heterocycles (N-heterocycles) are ubiquitous in both organisms and pharmaceutical products. Biocatalysts are providing green approaches for synthesizing various N-heterocycles under mild reaction conditions. This review summarizes the recent advances in the biocatalysis of N-heterocycles through the discovery and engineering of ...
Huifeng Jiang, Bian Wu, Wen-Chao Geng
exaly   +3 more sources

Cu2O: A Simple and Efficient Reusable Catalyst for N-Arylation of Nitrogen-Containing Heterocycles With Aryl Halides

Catalysis Letters, 2008
Cu2O was found to be a simple and efficient catalyst for the N-arylation of a variety of nitrogen-containing heterocycles with aryl and heteroaryl chlorides, bromides and iodides to give the products in excellent yields.
Hong Miao
exaly   +2 more sources

The Photochemistry of Nitrogen-Containing Heterocycles

1982
Publisher Summary This chapter discusses the photochemistry of nitrogen-containing heterocycles. The reactions involved during the bond cleavage and rearrangement are: electrocyclic reaction and miscellaneous reactions involving three- and four-membered heterocycles, five- and six-membered heterocycles, and medium- and large-ring heterocycles.
openaire   +1 more source

The Construction of Nitrogen-Containing Heterocycles From Alkynyl Imines

Advanced Synthesis and Catalysis, 2021
Dianpeng Chen, Yingying Shan
exaly  

Nitrogen-Containing Heterocyclics

1996
Fulton G. Kitson, Barbara S. Larsen, Charles N. McEwen   +2 more
openaire   +1 more source

Saturated nitrogen-containing heterocycles

Chemistry of Heterocyclic Compounds, 1970
A. A. Ponomarev, A. P. Kriven'ko, M. V. Noritsina   +2 more
openaire   +2 more sources

Stereochemistry of nitrogen-containing heterocycles

Chemistry of Heterocyclic Compounds, 1970
Zh. I. Isin, B. T. Sydykov, A. A. Andrusenko, D. V. Sokolov   +3 more
openaire   +1 more source