Results 121 to 130 of about 51,237 (293)

Catalytic Decarboxylation of 2-Alkynoic Acids

, 2016
A very efficient protocol enabling catalytic decarboxylation of a wide range of 2-alkynoic acids is described. The reaction conditions and the scope of the process are examined.
Andrej Kolarovič (2208841), Zuzana Fáberová (2349589)   +1 more
core   +1 more source

Low‐Temperature in Situ Upgrading of Ultra‐Deep Heavy Oil Using Ni–Ce/MOF–OTf Superacid Catalysts to Enhance Energy Utilization and Sustainability

EcoEnergy, EarlyView.
A triflate‐functionalized Ni–Ce/MOF–OTf superacid enables low‐temperature (∼140°C) in situ upgrading of ultra‐deep heavy oil. It reduces viscosity by 92.11% in 12 h, maintains activity over cycles, and delivers 90.25% recovery with a lower carbon footprint by selective bond cleavage. ABSTRACT Ultra‐deep heavy oil is an important unconventional resource,
Li Wang, Ji‐Xiang Guo, Qiming Huang, Kunpeng Li, Chi Li, Yajie Wu   +5 more
wiley   +1 more source

Decarboxylative sulfation by persulfates

Chemical Science
Decarboxylative radical sulfation is achieved with persulfates functioning as both oxidants and sulfating agents to facilitate C–OSO 3 − bond formation. Synthesis of organosulfates from carboxylic-acid-based drugs may improve their metabolic profiles.
Zhen Xia, Ting Deng, Chunlan Song, Jiakun Li   +3 more
openaire   +2 more sources

Optimally Carbonized Mangrove Wood–Derived Hard Carbon with a Soft Carbon Coating for High‐Performance Sodium‐Ion Battery Anodes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
High‐performance SIB anodes are developed using mangrove wood–derived hard carbon, optimized through controlled carbonization temperatures and pitch‐derived soft carbon coatings. The resulting PC‐10 composite achieves a superior reversible capacity of 297.5 mAh g−1 and an 82% ICE by suppressing irreversible reactions and enhancing interfacial stability
Hyung‐Keun Shin, Gyoo‐Rin Kim, Seong‐Ju Han, Jeong Mi Yeon, Hyun‐Kyung Kim   +4 more
wiley   +1 more source

Manganese (III)-Bis(salicylaldehyde)-4-Methyl-1,2-Phenylenediimine (Mn-BSMP) as an Inexpensive N2O2 Type Schiff Base Catalyst for Oxidative Decarboxylation of Carboxylic Acids with (n-Bu4NIO4) in the Presence of Imidazol [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2011
In this study, bis(salicylaldehyde)-4-methyl-1,2-phenylenediimine (BSMP) as a Schiff base ligand of N2O2-type and its Mn and Fe complex as M-BSMP catalyst were synthesized and characterized by UV-Vis, IR spectroscopy and elemental analysis.
Gholamreza Karimipour, Morteza Montazerozohori, Nasrin Haghighat Naeini   +2 more
doaj  

THERMAL DECARBOXYLATION OF CHLOROBENZOIC ACIDS

, 1956
Thermal decarboxylation of o-chloro- and 2-4-dichlorobenzoic acids in resorcinol solution follows SE2. mechanism. The activation energies, frequency factors and entropies of activation are: 32300 cals. mole -1, 6.76x1010 sec. -1 and _12.0 cals.
MISS AZIZ SIDDIQUI, S. S. MUHAMMED
core   +1 more source

Enhanced Photocatalytic Antibiotic Micropollutants Removal Resulting From a Synergism Between Cu Single Atoms and Carbon Vacancies on Graphitic Carbon Nitride

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Scheme of the synergistic degradation for antibiotic micropollutants in the Cu/ag‐C3N4 system. Photocatalytic processes driven by visible‐light irradiation offer a sustainable means of micropollutants removal from aquatic environments without the addition of reagents.
Xiaozhe Song, Cong Yan, Qinghua Yan, Congzhe Ren, Xin Liu, Ruiyan Zhang, Lei Chen, Chongqing Xu, Zhouyang Long, Wenyu Wang, Mingming Song, Xiaoguo Shi, Hui Wang   +12 more
wiley   +1 more source

Ultrafast Chemical Dynamics: Photocatalytic decarboxylation

, 2019
Experimental data associated with the ERC Advanced Grant project CAPRI (PI Prof A.J. Orr-Ewing) and from use of the Central Laser Facility at the Rutherford Appleton Laboratory.
Sneha, Mahima, Lewis-Borrell, Luke, Orr-Ewing, Andrew   +2 more
core   +1 more source

Synergistic Molecular Modulation of ππ Stacking for High‐Performance Pitch‐Derived Hard Carbon Anodes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A synergistic molecular strategy is demonstrated to disrupt intrinsic ππ stacking in pitch, boosting 6‐fold sulfonation, yielding a hard carbon with 0.371 nm interlayer spacing and maximized closed pores, and achieving a high reversible capacity, remarkable rate capability (205.6 mAh g−1 at 2 A g−1) and cyclic stability.
Xiang Wang, Yangyang Chu, Shuaipeng Liu, Ruyao Zhang, Zeyu Zhu, Qiang Li, Weixiang Li, Ya‐Xia Yin, Sailong Xu   +8 more
wiley   +1 more source

Reductive decarboxylation of bicyclic prolinic systems: a new approach to the enantioselective synthesis of the Geissman-Waiss lactone. X-ray structure determination of a key lactone intermediate

Journal of the Brazilian Chemical Society, 2003
Two concise and enantioselective syntheses of the necine base precursors (1R,5R)-N-Cbz and N-Boc-2-oxa-6-azabicyclo[3.3.0]octan-3-ones (Geissman-Waiss lactones) were carried out from two enantiomerically pure endocyclic five-membered enecarbamates with ...
Ambrósio João Carlos L., Santos Regina Helena de A., Correia Carlos R. D.   +2 more
doaj