Results 131 to 140 of about 173,009 (382)

Tailoring Regioselectivity‐Controlled UDP‐Glycosyltransferase for Bidirectional Glycosylation of Tyrosol via Free Energy‐Driven Pocket Reshaping and Tunnel Engineering

open access: yesAdvanced Science, EarlyView.
To address inherent limitations in regioselectivity and catalytic efficiency of UDP‐glycosyltransferases, an integrated strategy combining free‐energy driven pocket reshaping and tunnel engineering is developed. This strategy enables UGTBL1 to bidirectional glycosylation of tyrosol, synthesizing salidroside or icariside D2 without extensive screening ...
Ziyu Zhang   +7 more
wiley   +1 more source

Methylthiohexa‐1,3‐Diene: Anionic Polymerization of a Diene with Thioether Moiety Enables Post‐Polymerization Modification and Antimicrobial Materials

open access: yesAngewandte Chemie, EarlyView.
The thioether‐containing 6‐methylthio‐hexa‐1,3‐diene (MTHD) monomer is prepared from the biobased methional. The obtained isomeric cis‐/trans‐mixture of the diene can be successfully homo‐ and copolymerized via anionic techniques. Targeting the thioether groups via post‐polymerization modifications (i.e.
Moritz Rauschenbach   +2 more
wiley   +2 more sources

A INFLUÊNCIA DA LIGAÇÃO DE HIDROGÊNIO EM REAÇÕES QUÍMICAS: REAÇÃO DE PRILESCHAJEW

open access: yesQuímica Nova, 2015
Theoretical analysis at the BHandHLYP/6-311++G(d,p) level of theory with the support of QTAIM calculations was used to reinvestigate the structure of an intermolecular system formed between ethylene oxide (C2H4O) and formic acid (HCO2H) after the ...
Mauro A. Bueno, Boaz G. Oliveira
doaj   +1 more source

In Situ Generated Silver Nanoparticles on Boron Nitride Nanosheets Followed by Silane Modification in High‐Performance Epoxy Nanocomposites for Advanced Packaging Applications

open access: yesAdvanced Electronic Materials, EarlyView.
 . Abstract The increasing power density and miniaturization of modern electronic devices have underscored the critical need for efficient thermal management solutions. Boron nitride nanosheets (BNNS) have emerged as promising fillers for thermally conductive epoxy based composite.
Zihao Lin   +7 more
wiley   +1 more source

Monomer‐Dependent Selectivity in Sulfur‐Containing Ring‐Opening Copolymerisation: Bimetallic Catalysis for Predictive Design of Degradable Polymers

open access: yesAngewandte Chemie, EarlyView.
A unified Cr(III)/Rb(I) catalyst was developed for sulfur‐based ring‐opening copolymerisation (ROCOP), enabling high selectivity. Perfectly alternating copolymers were obtained from COS with minimal byproducts. PhNCS was identified as a practical alternative. Lower selectivity and O/S scrambling were observed for CS2 and thioanhydride . Abstract Sulfur‐
Bhargav R. Manjunatha   +5 more
wiley   +2 more sources

The Search for an Epoxide Precursor in Trimethylenemethane (TMM) Cycloaddition Reactions [PDF]

open access: yes, 2012
Trimethylenemethane (TMM) cycloaddition is a Pd(0)-catalyzed process in which new carbon rings are formed, which can be potentially useful in synthetic organic processes.
Miko, Christopher
core   +2 more sources

The Structure‐Activity Relationship and Reusability of Chiral Azacrown Ethers Derived from L‐Threitol

open access: yesAsian Journal of Organic Chemistry, EarlyView.
Chiral azacrown ethers from threitol were synthesized, and their catalytic activity and reusability were investigated in liquid–liquid and solid–liquid phase‐transfer reactions together with some previously synthesized catalysts. Some structure‐effect relationships were explored, while the recoverability of the crown ethers was demonstrated.
Bertalan Varga   +5 more
wiley   +1 more source

Exo‐Selective Intramolecular (4+3) Cycloadditions to Trans‐Fused Perhydroazulenes: An Asymmetric Formal Synthesis of (−)‐Pseudolaric Acid B

open access: yesAngewandte Chemie, EarlyView.
We present an asymmetric formal synthesis of pseudolaric acid B, for which we developed a new family of substrates with an epoxide geminally tethered to a sidechain bearing a furan, which undergoes a TESOTf‐catalyzed intramolecular (4+3) cycloaddition to yield the trans‐fused perhydroazulene core and the requisite quaternary stereocenter of the natural
Zengsheng Yin   +7 more
wiley   +2 more sources

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