Results 31 to 40 of about 32,974 (279)

Visible light induced alkene aminopyridylation using N-aminopyridinium salts as bifunctional reagents

Nature Communications, 2019
A key difficulty to overcome in pyridinium salts functionalization is the regioselectivity at the two competing C2 and C4 sites. Here, the authors show bifunctional N-aminopyridinium salts reagents delivering both the aminyl radical and the pyridyl group
Yonghoon Moon, Bohyun Park, Inwon Kim, Gyumin Kang, Sanghoon Shin, Dahye Kang, Mu-Hyun Baik, Sungwoo Hong   +7 more
doaj   +1 more source

Regioselectivity-Switchable Catalytic Annulations of Alkynyl α‑Diketones and α‑Cyanoketones

, 2019
Regioselectivity-switchable reactions hold irreplaceable importance in the construction of diversified architectures. In this work, Brønsted base-catalyzed regioselectivity-switchable annulations between alkynyl α-diketones and α-cyanoketones have been ...
Xinqiang Fang, Rui Liu, Banoth Paplal, Rui Liu (54031), Shuhua Liu (1598038), Jinggong Liu, Jinggong Liu (1528981), Shuang Yang (64650), Zhizhou Chen, Banoth Paplal (8072522), Shuang Yang, Sakkani Nagaraju, Shuhua Liu, Zhizhou Chen (8072519), Xinqiang Fang (1904908), Sakkani Nagaraju (8072516)   +15 more
core   +1 more source

Improving regioselectivity of phenylalanine aminomutase from Taxus chinensis by semi-rational mutagenesis for the biocatalytic amination of cinnamates

Frontiers in Bioengineering and Biotechnology
The occupancy of the binding pocket by the substrate ultimately determines the outcome of enzyme catalysis. Previous engineering and substrate scope of phenylalanine aminomutase from Taxus chinensis (TcPAM) has generated valuable knowledge about the ...
Tao Tang, Miao Wang, Yunyun Zhang, Yijun Chen   +3 more
doaj   +1 more source

Regioselective magnetization in semiconducting nanorods

Nature Nanotechnology, 2020
Chirality-the property of an object wherein it is distinguishable from its mirror image-is of widespread interest in chemistry and biology1-6. Regioselective magnetization of one-dimensional semiconductors enables anisotropic magnetism at room temperature, as well as the manipulation of spin polarization-the properties essential for spintronics and ...
Tao-Tao Zhuang, Yi Li, Xiaoqing Gao, Mingyang Wei, F. Pelayo García de Arquer, Petar Todorović, Jie Tian, Gongpu Li, Chong Zhang, Xiyan Li, Liang Dong, Yonghong Song, Yang Lu, Xuekang Yang, Libing Zhang, Fengjia Fan, Shana O. Kelley, Shu-Hong Yu, Zhiyong Tang, Edward H. Sargent   +19 more
openaire   +3 more sources

Supramolecular control of regioselectivity in the hydroformylation reaction:Substrate preorganization and second coordination sphere catalysis [PDF]

, 2021
In this thesis supramolecular strategies were investigated to obtain control over the regioselectivity in the hydroformylation reaction. In the hydroformylation reaction a double bond is reacted with syngas mixture (H2:CO) in the presence of a transition
Linnebank, P.R.
core   +15 more sources

Metal-Free Regiodivergent Addition of Carbon Nucleophiles to α,β-Unsaturated Electrophiles

Molecules, 2017
A mild and metal-free regiodivergent addition of carbon nucleophiles to α,β-unsaturated electrophiles was developed. Total 1,2-regioselectivity was observed in the addition of nitrobenzyl chloride derivative 1 to α,β-unsaturated aldehydes 2 in the ...
Cédric Spitz, Alain G. Giuglio-Tonolo, Thierry Terme, Patrice Vanelle   +3 more
doaj   +1 more source

Regioselectivity Control of the Ring Opening of Epoxides With Sodium Azide in a Microreactor [PDF]

, 2012
The reaction of different types of aromatic and aliphatic epoxides with sodium azide to give vicinal azido alcohols was studied in a microreactor with and without pillars in the channels.
Joe, Daejune, Rajesh Munirathinam, Joe, D.J., Daejune Joe, Jurriaan Huskens, Munirathinam, Rajesh, Willem Verboom, Huskens, Jurriaan, Verboom, Willem   +8 more
core   +2 more sources

Highly Regioselective Friedländer Reaction [PDF]

Organic Letters, 2001
[reaction: see text]. A highly regioselective Friedländer reaction is described. By introduction of a phosphonate group at one of the alpha-carbons of a ketone, regioselectivity can be perfectly controlled.
Y, Hsiao, N R, Rivera, N, Yasuda, D L, Hughes, P J, Reider   +4 more
openaire   +2 more sources

Predicting Flavonoid UGT Regioselectivity [PDF]

, 2011
Machine learning was applied to a challenging and biologically significant protein classification problem: the prediction of avonoid UGT acceptor regioselectivity from primary sequence.
Rhydon Jackson, McIntosh, Cecilia, Cecilia McIntosh, Pfeiffer, Phillip, Debra Knisley, Knisley, Debra, Phillip Pfeiffer, Jackson, Rhydon   +7 more
core   +1 more source

A Chemical Framework for Engineering Extracellular Vesicles’ Biointerface to Advance Precision Therapeutics

Advanced Materials, EarlyView.
Extracellular vesicles (EVs) are cell‐derived nanoparticles that mediate intercellular communication through their dynamic biointerfaces. Owing to their intrinsic biological functions, EVs have emerged as promising platforms for biomedical applications.
Leila Pourtalebi Jahromi, Felix Geng, Jan‐Noël Frenzke, Gregor Fuhrmann   +3 more
wiley   +1 more source