Results 101 to 110 of about 39,817 (294)

Synergistic Visible Light Nanophotocatalysis and Asymmetric Organocatalysis for the Stereoselective α‐Alkylation of Aldehydes

Advanced Synthesis &Catalysis, EarlyView.
An unprecedent dual catalytic nanophotocatalytic and asymmetric organocatalytic system for the α‐functionalization of aldehydes is developed using carbon nanodots as photosensitizers. The optimized methodology yields the alkylated products with up to 94% yield and up to 98:2 e.r., evidencing the possible recycling of the nanocatalysts.
Antonio Di Sabato, Marta Santoni, Vyali Georgian Moldoveanu, Alessandro Camilli, Marta Feroci, Giorgio Olivo, Beatrice Simonis, Elisa Sturabotti, Francesca Leonelli, Fabrizio Vetica   +9 more
wiley   +1 more source

Molybdenum-catalyzed enantioselective sulfoxidation controlled by a nonclassical hydrogen bond between coordinated chiral imidazolium-based dicarboxylate and peroxido ligands [PDF]

, 2018
Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities.
Carrasco Carrasco, Carlos Jesús, Galindo del Pozo, Agustín, Montilla Ramos, Francisco Javier   +2 more
core  

A selective transformation of enals into chiral γ-amino alcohols. [PDF]

, 2013
A one-pot synthesis of chiral amino alcohols from α,β-unsaturated aldehydes is reported which circumvents competitive 1,2- versus 1,4-boryl addition, by means of using a sterically hindered amine-derived imine.
Batsanov, A. S., Calow, A. D. J., Fernández, E., Pujol, A., Solé, C., Whiting, A.   +5 more
core   +1 more source

Super‐Heterostructures of Twisted Pd Nanoarrays Epitaxially Grown on Chiral Au Nanorods Boost Circularly Polarized Photocatalysis

Advanced Science, EarlyView.
Au‐Pd super‐heterostructures not only retard the damping of chiroptical response but also enantio‐selectively enhance photocatalysis, thanks to the chiral electromagnetic field and chiral hot electrons. Abstract Seed‐mediated growth provides an efficient way to produce chiral hybrid nanocrystals, mainly benefitting from the recent successful synthesis ...
Taotao Luo, Haoyu Li, Zhicheng Zhang, Shenli Wang, Xiaobin Pan, Stefanos Mourdikoudis, Chao Xue, Junjun Li, Kwok‐Yin Wong, Guangchao Zheng   +9 more
wiley   +1 more source

Organocatalytic C─O Bond Cleavage and Asymmetric Transformations via [1,3]‐Sigmatropic Rearrangement

Advanced Science, EarlyView.
A direct asymmetric strategy for fulfilling the functional group transfer by aryl ether cleavage and migration is developed, representing the first Brønsted base‐catalyzed asymmetric [1,3]‐sigmatropic rearrangement reaction. The resulting chiral benzofuran products generated through this strategy exhibit significant 3D‐dimensionality and demonstrate ...
Lei Peng, Yu Chang, Liangchen Yin, Jinbang Zhang, Xuli Feng, Pengfei Wang, Wenling Qin, Hailong Yan   +7 more
wiley   +1 more source

Rhodium/phospholane-phosphite catalysts give unusually high regioselectivity in the enantioselective hydroformylation of vinyl arenes [PDF]

, 2014
Using the phospholane-phosphite ligand, BOBPHOS, almost perfect regioselectivities and high enantioselectivities (up to 92% ee) are observed in Rh catalysed enantioselective hydroformylation of vinyl arenes.
Clarke, Matthew L., Cobley, Christopher J., Mahoney, Thomas, Noonan, Gary M.   +3 more
core   +1 more source

Phase Transition in Halide Double Perovskites for Solar‐To‐Chemical Energy Conversion

Advanced Energy Materials, EarlyView.
Disorder‐to‐order phase transition in double perovskite Cs2AgBiBr6 eliminates self‐trapped excitons and antisite defects and promotes charge separation, with over sixfold photoactivity enhancement in photocatalytic C−H bond activation. Abstract Halide double perovskites have recently garnered significant interest in solar energy conversion applications
Chunhua Wang, Zhirun Xie, Pengshan Xie, Huiqiang Liang, Yang Ding, Yannan Wang, Michael K.H. Leung, Guosong Zeng, Johnny C. Ho, Sateesh Bandaru, Ning Han, Bao‐Lian Su, Yun Hau Ng   +12 more
wiley   +1 more source

Enantiomerically Enriched Aziridine‐2‐carboxylates via Copper‐Catalyzed Reductive Kinetic Resolution of 2H‐Azirines

Angewandte Chemie, EarlyView.
Kinetic resolution by copper hydride catalyzed reduction of 2H‐azirines secured optically enriched N‐H aziridine‐2‐carboxylates with excellent diastereoselectivity (>20:1) and good enantioselectivity (up to 94% ee). DFT calculations and non‐covalent interaction analysis established the reaction pathway and revealed two key non‐covalent interactions ...
Yinuo Zheng, Elvis Wang Hei Ng, Antonio Rizzo, Pauline Chiu   +3 more
wiley   +2 more sources

Enantioselective Esterification of Ibuprofen under Microwave Irradiation

Molecules, 2013
Enantioselective esterification of ibuprofen has been successfully carried out in an organic solvent catalyzed by recombinant APE 1547 (a thermophilic esterase from the archaeon Aeropyrum pernix K1). Here we used microwave irradiation (MW) as the mode of
Dantong Zhao, Lei Wang, Hong Yue, Hong Zhang, Xuedong Fang, Ge Chen, Xuedun Niu, Zecheng Yang, Zhi Wang   +8 more
doaj   +1 more source

CorNet: Assigning function to networks of co-evolving residues by automated literature mining. [PDF]

PLoS ONE, 2017
CorNet is a web-based tool for the analysis of co-evolving residue positions in protein super-family sequence alignments. CorNet projects external information such as mutation data extracted from literature on interactively displayed groups of co ...
Tom van den Bergh, Giorgio Tamo, Alberto Nobili, Yifeng Tao, Tianwei Tan, Uwe T Bornscheuer, Remko K P Kuipers, Bas Vroling, René M de Jong, Kalyanasundaram Subramanian, Peter J Schaap, Tom Desmet, Bernd Nidetzky, Gert Vriend, Henk-Jan Joosten   +14 more
doaj   +1 more source