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Production of hydrogen from renewable sources, particularly from water, is an intensive area of research, which has far-reaching relevance in hydrogen economy. A homogeneous catalytic method is presented for producing clean hydrogen gas from water, in a reaction of water with a diboron compound as the reductant, under ambient reaction conditions. The Pd-catalytic system is stable in water and displays excellent recyclability. Hydroxy analogues such as alcohols are compatible with the Pd/BPin system and generate hydrogen gas efficiently. The BPin-HO system, in the presence of palladium, is an excellent catalytic system for selective hydrogenation of olefins.
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http://dx.doi.org/10.1021/acs.orglett.6b02508 | DOI Listing |
J Am Chem Soc
June 2025
Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
We have developed a copper-catalyzed formal aldehydic C-H borylation using a neutral sp-sp diboron reagent, LBH-Bpin (where L is a σ-donor), leading to the one-pot synthesis of diverse acylboranes. Notably, the BH moieties in the acylborane can be further used to construct boracycles. This protocol enables straightforward functional group (FG) replacement of commercial medicines with an acylboron motif.
View Article and Find Full Text PDFACS Omega
March 2025
BioAI Drug Safety Prediction Platform, Quris, HaNatsiv St 6, Tel Aviv-Yafo, 6701033, Israel.
Chemical-based fluorescent sensors with the capability of long-term stability and low cost are promising agents in clinical diagnosis and medical research. Measuring glucose levels inside cells and their surroundings provides insight into cellular metabolic homeostasis and may be employed as an indicator for potential pathological conditions. Anthracene-based diboronic acid (BA) derivatives offer a reversible and covalent binding mechanism for glucose recognition, which enables robust and continuous glucose monitoring.
View Article and Find Full Text PDFACS Omega
November 2024
BioAI Drug Safety Prediction Platform, Quris, HaNatsiv St 6, Tel Aviv-Yafo 6701033, Israel.
Liver 3D cell models are regularly employed as a screening platform for predicting the metabolic safety of drugs, by monitoring the physiological responses of the spheroids, through the measurement of relevant markers of normal liver physiology, notably glucose. Measuring glucose levels within the spheroids and their surroundings provides insight into the metabolic homeostasis of liver cells and may be employed as an indication of potential drug-induced toxicity. Several ortho-aminomethyl phenylboronic acid (PDBA) glucose sensors have been developed.
View Article and Find Full Text PDFJ Phys Chem B
September 2024
iOMICAS Research Institute, Pontificia Universidad Javeriana, Calle 17 # 121B-155, Santiago de Cali, Valle del Cauca 760031, Colombia.
The accurate calculation of reaction-free energies (Δ°) for diboronic acids and carbohydrates is challenging due to reactant flexibility and strong solute-solvent interactions. In this study, these challenges are addressed with a semiautomatic workflow based on quantum chemistry methods to calculate conformational free energies, generate microsolvated solute structural ensembles, and compute Δ°. Workflow parameters were optimized for accuracy and precision while controlling computational costs.
View Article and Find Full Text PDFJ Am Chem Soc
June 2024
Department of Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong SAR 999077, P. R. China.
Our study unveils a novel approach to accessing boryl radicals through the spontaneous homolytic cleavage of B-B bonds. We synthesized a hexaaryl-substituted diboron(6) dianion, , via the reductive B-B coupling of 9-borafluorene. Intriguingly, compound exhibits the ability to undergo homolytic B-B bond cleavage, leading to the formation of boryl radical anions, as confirmed by EPR studies, in the presence of the 2.
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