AI Article Synopsis
- Conjugated aldehydes and ketones react with Me2PhSiBpin in the presence of Au nanoparticles on TiO2, leading to β-borylation products through intermediate silaboration adducts.
- This reaction pathway contrasts with similar metal-catalyzed processes, which typically yield β-silylation instead.
- The β-borylation process is also effective with pinBBpin under the same conditions across various conjugated carbonyl compounds, including less reactive esters and amides in Au-catalyzed silaboration attempts.
Article Abstract
Conjugated aldehydes and ketones undergo reaction with Me2PhSiBpin (pin: pinacolato) catalyzed by Au nanoparticles supported on TiO2 forming exclusively the β-borylation products, via the intermediate formation of the labile silaboration adducts. This chemoselectivity pathway is complementary to the so far known analogous reaction catalyzed by other metals, where β-silylation occurs instead. β-Borylation also occurs with pinBBpin under identical reaction conditions in a variety of conjugated carbonyl compounds, including esters and amides which are unreactive in their attempted Au-catalyzed silaboration.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d0ob01806f | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Selective Synthesis of -Michael Acceptors via Hydroalkylation of Conjugated Alkynes.
J Am Chem Soc
December 2024
Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.
Hydroalkylation of terminal alkynes is a powerful approach to the synthesis of disubstituted alkenes. However, its application is largely unexplored in the synthesis of α,β-unsaturated carbonyls, which are common among synthetic intermediates and biologically active molecules. The thermodynamically less stable -isomers of activated alkenes have been particularly challenging to access because of their propensity for isomerization and the paucity of reliable -selective hydroalkylation methods.
View Article and Find Full Text PDFExtended Tetrathiafulvalene Multi-Redox Systems Incorporating 4,5-Dihydroazuleno[2,1,8-ija]azulene Cores.
Angew Chem Int Ed Engl
December 2024
University of Copenhagen, Department of Chemistry, Universitetsparken 5, DK-2100, Copenhagen, DENMARK.
The introduction of 4,5-dihydroazuleno[2,1,8-ija]azulene as a central core between two 1,4-dithiafulvene (DTF) units provides a novel class of extended tetrathiafulvalene (TTF) electron donors. Herein we present the synthesis of such compounds with the azulenoazulene further expanded by annulation to benzene, naphthalene, or thiophene rings. Moreover, unsymmetrical donor-acceptor chromophores with one DTF and one carbonyl at the central core are presented.
View Article and Find Full Text PDFMetal (M = Cr, Mo, W, Re) carbonyl complexes with porphyrin and carborane isocyanide ligands: light-induced oxidation and carbon oxide release for antitumor efficacy.
Biomater Sci
December 2024
A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Bld. 1 Vavilov Street, 119334 Moscow, Russian Federation.
The tetrapyrrolic macrocycle as a scaffold for various chemical modifications provides broad opportunities for the preparation of complex multifunctional conjugates suitable for binary antitumor therapies. Typically, illumination with monochromatic light triggers the photochemical generation of reactive oxygen species (ROS) (photodynamic effect). However, more therapeutically valuable effects can be achieved upon photoactivation of tetrapyrrole derivatives.
View Article and Find Full Text PDFMolecular Insight into the Catalytic Mechanism of the Sesquiterpene Cyclase BcABA3.
J Agric Food Chem
December 2024
CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
BcABA3 is an unusual sesquiterpene synthase that lacks the conserved DDxxD and DTE/NSE motifs. Despite this, it can catalyze the conversion of farnesyl diphosphate to 2Z,4E-α-ionylideneethane. We used structure prediction, multiscale simulations, and site-directed mutagenesis experiments to investigate BcABA3 and its catalytic mechanism.
View Article and Find Full Text PDFElectropolymerization of s-Triazines and Their Charge Storage Performance in Aqueous Acidic Electrolytes.
Polymers (Basel)
November 2024
Department of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Article Synopsis
- Designing π-conjugated conductive polymers with redox-active groups can improve charge storage in aqueous energy devices.
- The electropolymerization of s-triazine on carbon cloth leads to a polytriazine-coated electrode that demonstrates strong charge storage capabilities, achieving specific capacities of 101.4 mAh g-1 in acidic solution and 50.3 mAh g-1 in zinc sulfate.
- A device using these electrodes shows impressive energy and power densities, and maintains 83.3% capacity after 2500 cycles, suggesting that polytriazine is a promising material for future energy storage applications.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!