Results 51 to 60 of about 2,786 (190)

Chelation-Assisted Substrate-Controlled Asymmetric Lithiation-Allylboration of Chiral Carbamate 1,2,4-Butanetriol Acetonide

Molecules, 2015
The lithiation of 2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethyl diisopropylcarbamate (1) is achieved freely by sec-butyllithium in diethylether with high lk-diastereoselectivity: the bicyclic chelate complexes 3a and 3b are reacted with electrophiles to form ...
Adeem Mahmood, Hamad Z. Alkhathlan, Saima Parvez, Merajuddin Khan, Sohail A. Shahzad   +4 more
doaj   +1 more source

Switchable Magnesium Catalysis: Dehydrogenative Borylation Versus Hydroboration of Terminal Alkynes

ChemistryEurope
Organoboranes are key intermediates in modern synthetic chemistry, yet their preparation often relies on precious metal catalysts and multistep protocols.
Darakshan Parveen, Radhika Shrivas, Ganping Wang, Laurent Maron, Dipak Kumar Roy   +4 more
doaj   +1 more source

Protonation‐Induced Electron Density Redistribution Facilitates Aggregation in PNNP Dicopper Hydride Complexes

Chemistry – A European Journal, EarlyView.
Copper(I) hydride complexes often exhibit diverse aggregation behavior that can profoundly influence their structure and reactivity. In this study we use a combined experimental and computational approach to identify key structural an electronic factors that govern aggregation in PNNP dicopperhydride complexes.
Roel Laurentius Maria Bienenmann, Chattawat Thangsrikeattigun, Alexandra Julia Schanz, Martin Lutz, Mu‐Hyun Baik, Daniël Laurens Johannes Broere   +5 more
wiley   +1 more source

Fluorescent Diarylethenes With Polar Groups: Synthesis, Spectra, and Optical Microscopy Applications

Chemistry – A European Journal, EarlyView.
Blinking green and flashing red: photo‐switchable and photo‐activatable probes emitting green and red light were prepared and applied as bioconjugates in super‐resolution optical microscopy. ABSTRACT The use of photoactivatable fluorescent diarylethenes (fDAEs) in biology‐related light microscopy has been restricted by the lack of probes having freely ...
Kakishi Uno, Sven Nagorny, Ayse Aktalay, Dojin Kim, Mariano L. Bossi, Vladimir N. Belov, Stefan W. Hell   +6 more
wiley   +1 more source

Enantioselective Cu(I)-catalyzed borylative cyclization of enone-tethered cyclohexadienones and mechanistic insights

Nature Communications, 2022
Rapidly building molecular structures with both elements of complexity and flexibility is a key goal of organic synthesis. Here the authors show a tandem copper-catalyzed β-borylation/Michael addition on prochiral enone-tethered 2,5-cyclohexadienones, to
Sandip B. Jadhav, Soumya Ranjan Dash, Sundaram Maurya, Jagadeesh Babu Nanubolu, Kumar Vanka, Rambabu Chegondi   +5 more
doaj   +1 more source

Accessing Sn≥2 States of a TADF Emitter by Femtosecond NIR Spectroscopy

Chemistry – A European Journal, EarlyView.
The depicted thermally activated delayed fluorescence (TADF) emitter was studied by femtosecond near‐infrared (NIR) spectroscopy. A prominent NIR transition was shown to be strongly solvent‐dependent, with implication for intersystem crossing in the compound.
Wiebke Haselbach, Jasmin Matthes, Andreas Prüfer, Simon L. Zimmermann, Monika Flörke, Thomas J. J. Müller, Peter Gilch, Barbara E. Nogueira de Faria   +7 more
wiley   +1 more source

A planar per-borylated digermene

Dalton Transactions, 2023
A tetraboryl digermene features both a planar ‘alkene-like’ geometry for the Ge2B4 core, and an exceptionally short GeGe double bond, consistent with lowest energy (in silico) fragmentation into two triplet bis(boryl)germylene fragments.
Xiongfei Zheng, Agamemnon E. Crumpton, Mathias A. Ellwanger, Simon Aldridge   +3 more
openaire   +2 more sources

Iron‐Photocatalyzed C(sp3)–H Phosphonylation of Alkanes

Angewandte Chemie, Volume 138, Issue 26, 22 June 2026.
Alkyl phosphonates are valuable motifs that can be prepared by phosphonylations of various common functional groups. However, direct phosphonylations of C(sp3)–H bonds are limited to activated positions. Herein, we report an iron‐photocatalyzed phosphonylation of unactivated C(sp3)–H bonds using a novel phosphite radical trap, which is equipped with an
Ya Dong, Wangyujing Han, Hanwen Zhang, Santosh K. Pagire, Harry Meats, Adam Noble, Varinder K. Aggarwal   +6 more
wiley   +2 more sources

Changing N^C^O to C^N^O Coordination in Cyclometalated Pt(II) and Pd(II) Complexes Modulates Stability and Emission Characteristics: Toward Brighter Versatility

Chemistry – A European Journal, EarlyView.
A new class of cyclometalated metal complexes with pincer luminophores (C^N^O and N^C^O) is reported. They unite high photoluminescence efficiencies in liquid solutions at r.t. with tunable colors across the visible spectrum and convenient synthetic accessibility.
Joschua Lüke, Yokari Godinez‐Loyola, Alexander Hepp, Jutta Kösters, Cristian A. Strassert   +4 more
wiley   +1 more source

Nickel-catalyzed, silyl-directed, ortho-borylation of arenes via an unusual Ni(II)/Ni(IV) catalytic cycle

Nature Communications
Nickel-catalyzed C–H bond functionalization reactions provide an impressive alternative to those with noble metal catalysts due to their unique reactivity and low cost.
Xiaoshi Su, Guoao Li, Linke He, Shengda Chen, Xiaoliang Yang, Guoqiang Wang, Shuhua Li   +6 more
doaj   +1 more source