Results 1 to 10 of about 3,572,666 (356)

A strategy for sequence control in vinyl polymers via iterative controlled radical cyclization

open access: yesNature Communications, 2016
There is a growing interest in sequence-controlled polymers toward advanced functional materials. However, control of side-chain order for vinyl polymers has been lacking feasibility in the field of polymer synthesis because of the inherent feature of ...
Yusuke Hibi, M. Ouchi, M. Sawamoto
semanticscholar   +1 more source

Tandem Cu-catalyzed ketenimine formation and intramolecular nucleophile capture: Synthesis of 1,2-dihydro-2-iminoquinolines from 1-(o-acetamidophenyl)propargyl alcohols

open access: yesBeilstein Journal of Organic Chemistry, 2014
The copper-catalyzed ketenimine formation reaction of 1-(o-acetamidophenyl)propargyl alcohols with various sulfonyl azides is found to undergo a concomitant intramolecular nucleophile attack to generate 1,2-dihydro-2-iminoquinolines after aromatization ...
Gadi Ranjith Kumar   +3 more
doaj   +1 more source

Synthesis of vinyldihydropyran by cooperative catalysis [PDF]

open access: yesJournal of the Serbian Chemical Society, 2016
5-Unsaturated aldehydes with a suitably positioned allylic halide, or phosphate, leaving group undergo doubly-catalyzed cyclization to give dihydropyran derivatives.
Vulović Bojan   +3 more
doaj   +1 more source

Kinetics of Loop Formation in Polymer Chains [PDF]

open access: yes, 2007
We investigate the kinetics of loop formation in flexible ideal polymer chains (Rouse model), and polymers in good and poor solvents. We show for the Rouse model, using a modification of the theory of Szabo, Schulten, and Schulten, that the time scale ...
Hyeon, Changbong   +3 more
core   +2 more sources

SpyTag/SpyCatcher Cyclization Enhances the Thermostability of Firefly Luciferase

open access: yesPLoS ONE, 2016
SpyTag can spontaneously form a covalent isopeptide bond with its protein partner SpyCatcher. Firefly luciferase from Photinus pyralis was cyclized in vivo by fusing SpyCatcher at the N terminus and SpyTag at the C terminus.
M. Si, Qing-tao Xu, Ling Jiang, He Huang
semanticscholar   +1 more source

Visible-Light-Mediated Generation of Nitrogen-Centered Radicals: Metal-Free Hydroimination and Iminohydroxylation Cyclization Reactions

open access: yesAngewandte Chemie, 2015
The formation and use of iminyl radicals in novel and divergent hydroimination and iminohydroxylation cyclization reactions has been accomplished through the design of a new class of reactive O-aryl oximes.
Jacob Davies   +4 more
semanticscholar   +1 more source

A Simple Metal-Free Cyclization for the Synthesis of 4-Methylene-3-Substituted Quinazolinone and Quinazolinthione Derivatives: Experiment and Theory

open access: yesFrontiers in Chemistry, 2019
A new series of 3-substituted 4-methylene-quinazolinthiones and 4-methylene-quinazolinones were synthesized in moderate to excellent yield through a simple reaction of 2-aminoacetophenones with isocyanates or isothiocyanates.
Huihui Yan   +5 more
doaj   +1 more source

An update on the synthesis and reactivity of spiro-fused β-lactams [PDF]

open access: yes, 2018
Beta-Lactam ring-containing compounds play a pivotal role in drug design and synthetic chemistry. Spirocyclic beta-lactams, representing an important beta-lactam subclass, have recently attracted considerable interest with respect to new synthetic ...
D'hooghe, Matthias, Dao Thi, Hang
core   +1 more source

Investigations on the Formation of 4-Aminobicyclo[2.2.2]-octanones

open access: yesMolecules, 2005
Benzylidene acetone reacts with thiocyanates derived from secondary amines in a one-pot reaction to give 4-aminobicyclo[2.2.2]octan-2-ones. The reaction mixture was investigated for the presence of possible intermediates using GC-MS.
Robert Weis   +5 more
doaj   +1 more source

Efficient backbone cyclization of linear peptides by a recombinant asparaginyl endopeptidase

open access: yesNature Communications, 2015
Cyclotides are diverse plant backbone cyclized peptides that have attracted interest as pharmaceutical scaffolds, but fundamentals of their biosynthetic origin remain elusive.
K. Harris   +10 more
semanticscholar   +1 more source

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