Phosphazene superbases are efficient organocatalysts for the metal-free catalytic hydrosilylation of carbon dioxide. They react with CO2 to form the respective phosphine oxides, but in the presence of hydrosilanes, CO2 can be selectively reduced to silyl formates, which can in turn be reduced to methoxysilanes by addition of an extra loading of silanes. Activities reach a TOF of 32 h(-1) with a TON of 759. It is also shown that unexpectedly, N,N-dimethylformamide can reduce CO2 to a mixture of silyl formates, acetals and methoxides in the absence of any catalyst.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c5cc01282a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Polyglycidamides: from Backbone-Promoted Amidation to Degradable Polyether with Wide-Range LCST.
Angew Chem Int Ed Engl
January 2025
South China University of Technology, Faculty of Materials Science and Engineering, 381 Wushan Road, 510641, Guangzhou, CHINA.
Amide groups occur extensively in natural and synthetic polymers cultivating their vital roles in biological and industrial worlds. We report here an efficient and controlled pathway to amide-functionalized polyethers through ring-opening polymerization (ROP) of commercially available ethyl glycidate followed by amidation of the pendant ester groups. Transesterification is inhibited during the ROP by use of a two-component organocatalyst.
View Article and Find Full Text PDFL-Aspartic acid-functionalized magnetic nanoparticles: as a new magnetically reusable bifunctional acid-base catalysts for the synthesis of benzo[b]pyran and pyrano[3,2-c] chromene derivatives.
Sci Rep
January 2025
Department of Chemistry, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
"Green chemistry" describes the development of new technologies that reduce or eliminate the need for hazardous compounds or the production of them. In order to accomplish this goal, we have developed a new magnetic recyclable biocatalyst in this study by successfully applying aspartic acid to magnetic nanoparticles. Aspartic acid's molecular makeup made it possible for it to stabilize on magnetic nanoparticles using a straightforward method.
View Article and Find Full Text PDFOne-Pot Synthesis of Chiral -Imidazolidinone Cyclohexenones.
J Org Chem
January 2025
Department of Chemistry, The Citadel, 171 Moultrie Street, Charleston, South Carolina 29409, United States.
We have developed a simple and straightforward synthesis of chiral -imidazolidinone cyclohexenones, featuring six contiguous stereocenters, from feedstock chemicals such as aminophenols, α,β-unsaturated aldehydes, and α-amino acids. Remarkably, this one-pot multicomponent reaction exhibits exceptional diastereoselectivity (>20:1 dr) and relies solely on an amino acid precursor as the chiral source, avoiding the use of transition metals or additional organocatalysts. This reaction is efficient and scalable, enabling synthesis on a gram-scale.
View Article and Find Full Text PDFNon-covalent organocatalyzed enantioselective cyclization reactions of α,β-unsaturated imines.
Beilstein J Org Chem
December 2024
Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Universidad de Alcalá (IRYCIS), 28805 Madrid, Spain.
Asymmetric cycloaddition is a straightforward strategy which enables the synthesis of structurally distinct cyclic derivatives which are difficult to access by other methodologies, using an efficient and atom-economical path from simple precursors. In recent years several asymmetric catalytic cyclization strategies have been accomplished for the construction of -heterocycles using various catalytic systems such as chiral metal catalysts, chiral Lewis acids or chiral organocatalysts. This review presents an overview of the recent advances in enantioselective cyclization reactions of 1-azadienes catalyzed by non-covalent organocatalysts.
View Article and Find Full Text PDF-Acyl--alkyl/aryl Sulfonamide Chemistry Assisted by Proximity for Modification and Covalent Inhibition of Endogenous Proteins in Living Systems.
Acc Chem Res
January 2025
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
ConspectusSelective chemical modification of endogenous proteins in living systems with synthetic small molecular probes is a central challenge in chemical biology. Such modification has a variety of applications important for biological and pharmaceutical research, including protein visualization, protein functionalization, proteome-wide profiling of enzyme activity, and irreversible inhibition of protein activity. Traditional chemistry for selective protein modification in cells largely relies on the high nucleophilicity of cysteine residues to ensure target-selectivity and site-specificity of modification.
View Article and Find Full Text PDFWant 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!