Results 121 to 130 of about 15,429 (247)

Regioselective Lactonization of Tetrasialic Acid [PDF]

Angewandte Chemie, 2000
, Cheng, , Lin, , Wang, , Lin, , Wu
openaire   +2 more sources

Synthesis of Oligonucleotide Conjugates Employing a Diselenide Linker

Chemistry – A European Journal, EarlyView.
ABSTRACT In this study, we report the synthesis of an alkylene linker containing a terminal 2‐cyanoethyl protected selenium functionality for coupling at the 5'‐end of an oligonucleotide by solid phase synthesis for the preparation of oligonucleotide conjugates.
Shivam Tikoo, Anne M. Noronha, Christopher J. Wilds   +2 more
wiley   +1 more source

Transition-Metal Hydride Catalysis Meets Nitrenoid Transfer: Design Principles for Precision C-N Bond Formation. [PDF]

Acc Chem Res
Lyu X, Choi H, Chang S.
europepmc   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

Chemistry – A European Journal, EarlyView.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source

Photochemical C4-Selective C-H Amination of Quinolines via <i>N</i>-Shift of Heteroaryl Azides. [PDF]

Org Lett
Dimasi A, Montoli A, Macetti G, Lo Presti L, Passarella D, Fasano V.   +5 more
europepmc   +1 more source

A Selectfluor‐based Polonovski Rearrangement Leading to Novel Entities for Synthetic and Medicinal Applications

Chemistry – A European Journal, EarlyView.
Starting from carboxylic acids and Selectfluor‐derivatives, functionalized diazabicyclooctanes can be obtained via a novel Polonovski‐type rearrangement proceeding under mild reaction conditions. Besides their use in organic synthesis the unique structure and reactivity of the rearrangement products enables applications in medicinal chemistry ...
Jakob Kuhn, Susanne Gradl, Vanessa Osterloh, Peter Gmeiner, Harald Hübner, Markus R. Heinrich   +5 more
wiley   +1 more source

Hydrogen Isotope Exchange in Pyridine Catalyzed by an Iron(II) Imido Complex: Counterion-Directed Regioselectivity. [PDF]

Angew Chem Int Ed Engl
Feng B, Li G, Gao Y, Yamamoto N, Pink M, Peng Q, Smith JM.   +6 more
europepmc   +1 more source

Controlled Formation and Unusual Reactivity of Cyanohexatriyne (HC7N), a Synthetically Challenging Interstellar Cyanopolyyne

Chemistry – A European Journal, EarlyView.
First controlled formation of cyanohexatriyne (HC7N) is achieved using a cobalt–alkyne masking strategy that overcomes the intrinsic instability of nitrile‐substituted polyynes. The approach enables spectroscopic validation of HC7N and reveals its pronounced electrophilicity through a selective conjugate addition with diethylamine.
Léa Lefrançois, Mano Cremer, Thierry Roisnel, Jean‐Claude Guillemin, Yann Trolez   +4 more
wiley   +1 more source

Synthesis of Unsymmetrical Carbazoles: A Mechanistic Cautionary Tale When Using <i>ortho</i>-Borylaryl Triflates in Catalysis. [PDF]

ACS Catal
Denman BN, Kavaguti DM, Roberts CC.
europepmc   +1 more source

Modular One‐Pot Access to π‐Expanded Tetrakis(Phenothiazinyl)‐Silanes With Broadly Tunable Redox and Emission Properties

Chemistry – A European Journal, EarlyView.
A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke, Lysander Presser, Leonard Karl, Christian Ganter, Thomas J. J. Müller   +4 more
wiley   +1 more source