Results 101 to 110 of about 17,972 (231)

Green ultrasound-assisted three-component click synthesis of novel 1H-1,2,3-triazole carrying benzothiazoles and fluorinated-1,2,4-triazole conjugates and their antimicrobial evaluation

Acta Pharmaceutica, 2017
The present study describes an efficient and ecofriendly, ultrasound, one-pot click cycloaddition approach for the construction of a novel series of 1,4-disubstituted-1,2,3-triazoles tethered with fluorinated 1,2,4-triazole-benzothiazole molecular ...
Rezki Nadjet, Aouad Mohamed Reda
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Enantioselective Cycloaddition Reactions Catalyzed by BINOL-Derived Phosphoric Acids and N-Triflyl Phosphoramides: Recent Advances

Molecules, 2015
Over the last several years there has been a huge increase in the development and applications of new efficient organocatalysts for enantioselective pericyclic reactions, which represent one of the most powerful types of organic transformations.
Felix E. Held, Dominik Grau, Svetlana B. Tsogoeva   +2 more
doaj   +1 more source

Recent advances in the synthesis of triazole derivatives [PDF]

, 2015
Triazole ring system has attracted a continuously growing interest of synthetic organic chemists and those dealing with the medicinal compounds due to its versatile potential to interact with biological systems.
Ahmad, Matloob, Aslam, Sana, Jawwad, Muhammad, Khan, Imran Ahmad, Mansha, Asim, Raza Naqvi, Syed Ali, Zahoor, Fawad   +6 more
core  

Noncanonical Amino Acids in the Interrogation of Cellular Protein Synthesis [PDF]

, 2011
Proteins in living cells can be made receptive to bioorthogonal chemistries through metabolic labeling with appropriately designed noncanonical amino acids (ncAAs).
Ngo, John T., Tirrell, David A.
core   +2 more sources

A Novel One-Pot Green Synthesis of Dispirooxindolo-pyrrolidines via 1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides

Molecules, 2015
A facile synthesis of dispirooxindolopyrrolidines has been accomplished via a one-pot three component 1,3-dipolar cycloaddition reaction. The reaction of azomethine ylides generated in situ from L-phenylalanine and substituted isatins with a series of ...
Abdulrahman I. Almansour, Natarajan Arumugam, Raju Suresh Kumar, Govindasami Periyasami, Hazem A. Ghabbour, Hoong-Kun Fun   +5 more
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Synthesis and In Silico Analysis of New Polyheterocyclic Molecules Derived from [1,4]-Benzoxazin-3-one and Their Inhibitory Effect against Pancreatic α-Amylase and Intestinal α-Glucosidase

Molecules
This study focuses on synthesizing a new series of isoxazolinyl-1,2,3-triazolyl-[1,4]-benzoxazin-3-one derivatives 5a–5o. The synthesis method involves a double 1,3-dipolar cycloaddition reaction following a “click chemistry” approach, starting from the ...
Mohamed Ellouz, Aziz Ihammi, Abdellah Baraich, Ayoub Farihi, Darifa Addichi, Saliha Loughmari, Nada Kheira Sebbar, Mohamed Bouhrim, Ramzi A. Mothana, Omar M. Noman, Bruno Eto, Fatiha Chigr, Mohammed Chigr   +12 more
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Cycloaddition Reactions of C,N-Diphenylnitrone to Methylene-γ-butyrolactones

Molecules, 2000
Cycloaddition of C,N-diphenylnitrone to α-methylene-γ-butyrolactone afforded two diastereomeric 5-spirosubstituted isoxazolidines with high selectivity.
Andrea Goti, Cristina Faggi, Franca M. Cordero, Martina Cacciarini   +3 more
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Rational Perturbation of the Fluorescence Quantum Yield in Emission‐Tunable and Predictable Fluorophores (Seoul‐Fluors) by a Facile Synthetic Method Involving C—H Activation† [PDF]

, 2015
Fluorescence imaging enables the uniquely sensitive observation of functional‐ and molecular‐recognition events in living cells. However, only a limited range of biological processes have been subjected to imaging because of the lack of a design strategy
Choi, Eun Joung, Jo, Ala, Kim, Eunha, Lee, Youngjun, Park, Seung Bum   +4 more
core   +1 more source

Reaction of Nitrilimines with Pyruvaldehyde Hydrazones: Synthesis and Antimicrobial Evaluation of Some New 1,2,4-Triazole Derivatives

Journal of Chemistry, 2015
A new series of 1,3,4,5,5-pentasubstituted-1,2,4-triazoles (4a–j, 6a–j) have been synthesized by the 1,3-dipolar cycloaddition of suitable nitrilimines 2 to pyruvaldehyde (2-oxopropanal) hydrazones having (COPh, COOMe, COOEt, Me/Me, and Me/Ph) groups 3 ...
Hany M. Dalloul
doaj   +1 more source

REACTIVITY OF N-SUBSTITUTED p-BENZO AND p-NAPHTHOQUINONEIMINE N-OXIDES TOWARD DIPOLAROPHILES [PDF]

Journal of Sciences, Islamic Republic of Iran, 1990
The dipolar cycloaddition reactivity of N-(1-naphthy1)-1,4- benzoquinoneimine N-oxide and N-phenyl-1,4- naphthoquinoneimine Noxide are investigated, The latter gives the expected adducts with common dipolarophiles such as acrylonitryle, methyl ...
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