Two sets of supported chiral thioureas, which differ in the length of the tether that connects the chiral appendage to the polymer structure and the effective functionalization, have been prepared by copolymerization of styrene, novel styryl thioureas derived from l-valine, and divinylbenzene. The efficiency of these polymeric thioureas has been tested in two different enantioselective transformations, namely, aza-Henry and nitro-Michael reactions, in neat reaction conditions. The obtained results show that it is possible to recycle the thiourea, and they are able to promote the reactions with good enantioselectivity at a low catalyst loading.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/cplu.201500476 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
ATP Regeneration from Pyruvate in the PURE System.
ACS Synth Biol
January 2025
Centre for Engineering Biology, Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FF, U.K.
The "Protein synthesis Using Recombinant Elements" ("PURE") system is a minimal biochemical system capable of carrying out cell-free protein synthesis using defined enzymatic components. This study extends PURE by integrating an ATP regeneration system based on pyruvate oxidase, acetate kinase, and catalase. The new pathway generates acetyl phosphate from pyruvate, phosphate, and oxygen, which is used to rephosphorylate ATP .
View Article and Find Full Text PDFIdentifying Upper d-Band Edge as Activity Descriptor for Ammonia Oxidation on PtCo Alloys in Low-Temperature Direct Ammonia Fuel Cells.
ACS Nano
January 2025
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215006, China.
Low-temperature direct ammonia fuel cell (DAFC) stands out as a more secure technology than the hydrogen fuel cell system, while there is still a lack of elegant bottom-up synthesis procedures for efficient ammonia oxidation reaction (AOR) electrocatalysts. The widely accepted d-band center, even with consideration of the d-band width, usually fails to describe variations in AOR reactivity in many practical conditions, and a more accurate activity descriptor is necessary for a less empirical synthesis path. Herein, the upper d-band edge, ε, derived from the d-band model, is identified as an effective descriptor for accurately establishing the descriptor-activity relationship.
View Article and Find Full Text PDFTowards assembling functional cyanobacterial β-carboxysomes in Oryza sativa chloroplasts.
Funct Integr Genomics
January 2025
The Energy and Resources Institute, Lodi Road, New Delhi, 110003, India.
The major limiting factor of photosynthesis in C3 plants is the enzyme, rubisco which inadequately distinguishes between carbon dioxide and oxygen. To overcome catalytic deficiencies of Rubisco, cyanobacteria utilize advanced protein microcompartments, called the carboxysomes which envelopes the enzymes, Rubisco and Carbonic Anhydrase (CA). These microcompartments facilitate the diffusion of bicarbonate ions which are converted to CO by CA, following in an increase in carbon flux near Rubisco boosting CO fixation process.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
Background: A better understanding of the molecular process that drive Alzheimer's disease(AD) are required to develop effective biomarkers and therapies. This includes determining how essential elements like Fe, Cu and Zn are involved in the disease. In the literature there is debate over the role of iron in AD and there are reports of increased, decreased and unchanged levels of Fe in AD brain.
View Article and Find Full Text PDFDiversity in Notch ligand-receptor signaling interactions.
Elife
January 2025
Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.
The Notch signaling pathway uses families of ligands and receptors to transmit signals to nearby cells. These components are expressed in diverse combinations in different cell types, interact in a many-to-many fashion, both within the same cell (in cis) and between cells (in trans), and their interactions are modulated by Fringe glycosyltransferases. A fundamental question is how the strength of Notch signaling depends on which pathway components are expressed, at what levels, and in which cells.
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!