Results 61 to 70 of about 9,657 (231)
When diazo compounds meet with organoboron compounds
, 2017 Transition-metal free reactions of diazo compounds with organoboron compounds provide some unique approaches for the formation of C–C, C–B and C–Si bonds.
Jianbo Wang
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Toward Chromoselective Transformations in Biological Systems: Perspectives and Challenges
Angewandte Chemie International Edition, EarlyView.Controlling biological systems with small‐molecule chromophores has evolved into a powerful strategy and is applied from chemical biology to medicine. However, the complexity of in vivo systems cannot be matched by a single wavelength of light. Developing methods to combine and individually control multiple chromophores is crucial.
Nadja A. Simeth
wiley +1 more source
Aspects of the chemistry of some highly crowded aromatic ligands [PDF]
, 1990 A series of ortho-substituted arylchlorophosphoranes has been prepared. The structures of these compounds have been studied by the use of (^31)Cl n.q.r. and solid-state (^31)P n.m.r. . It has been shown that ortho substitution by groups such as CH(_3) or
Straw, T. A.
core
Coupling reactions using flow-generated diazo compounds
, 2017 In recent years, the exploitation of flow technologies as an enabling tool to access unique chemical reactivity has flourished. This dissertation describes the utilisation of these flow methods to access new sets of highly versatile, unstable diazo ...
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Overcrowded Alkene Photo‐Redox‐Switches Based on Quinolinium/Carbene Building Blocks
Angewandte Chemie International Edition, EarlyView.A modular synthesis of a new class of photo‐ and redox‐switches is described based on the combination of quinolinium salts and carbenes. Photochemical switching allows to selectively switch between folded E/Z isomers, while electrochemical switching allows to change between neutral, radical cation and dicationic oxidation states, which are all isolable
Chris Burdenski +10 more
wiley +1 more source
Diazo Transfer From Nitrous Oxide Employing Phosphorus Ylides. [PDF]
Angew Chem Int Ed EnglA phosphorus ylide‐mediated strategy achieves the direct fixation of nitrous oxide (N2O) to access diazo compounds, which after intra‐ or intermolecular trapping, afford N2‐containing organic building blocks. This approach provides an alternative to hazardous diazo‐transfer reagents and establishes N2O fixation as a sustainable methodology.
Yu JK +4 more
europepmc +3 more sources
Chemistry – A European Journal, EarlyView.The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve +4 more
wiley +1 more source
Diazo compounds for the customization of important biomolecules [PDF]
, 2016 The selective modification of native biomolecules such as nucleic acid, signaling molecules, and peptides offers new tools for investigation biological processes.
Fei, Na
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Photo-cycloaddition reactions of vinyldiazo compounds
Nature CommunicationsHeterocyclic rings are important structural scaffolds encountered in both natural and synthetic compounds, and their biological activity often depends on these motifs.
Ming Bao +5 more
doaj +1 more source
Synthesis and characterization of mixed Amides-Imines and Amides-Azo Compound derived from Chrysanthemic acid and trimethoprim and study their biological activities [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2017 Chrysanthemic acid, Trimethoprim, amides, Imines and azo compound : all found to have enormous biological activities in different directions such as medical , pharmaceutical pesticidal …etc.
Mohammad F. Mesher +2 more
doaj +1 more source