نتایج جستجو برای: pyridine catalyzed huisgen cycloaddition

تعداد نتایج: 59656  

Journal: :Chemical communications 2009
Nozomi Saito Kengo Shiotani Atsushi Kinbara Yoshihiro Sato

A nickel-catalyzed [2+2+2] cycloaddition of two molecules of aryne and an alkene moiety in a alpha,omega-diene afforded 9,10-dihydrophenanthrene derivatives in good yields.

Journal: :Chemical communications 2009
Rosalie L M Teeuwen Sander S van Berkel Tim H H van Dulmen Sanne Schoffelen Silvie A Meeuwissen Han Zuilhof Frits A de Wolf Jan C M van Hest

Elastin-like polypeptides (ELPs) functionalized with azide or alkyne groups were produced biosynthetically and coupled via the Cu-catalyzed azide-alkyne cycloaddition to a variety of (bio)molecules.

Journal: :Organic & biomolecular chemistry 2013
Lei Zhang Hao Yu Zhilin Yang Honglei Liu Zhen Li Junhong Guo Yumei Xiao Hongchao Guo

Phosphine-catalyzed [3 + 2] cycloaddition of Morita-Baylis-Hillman carbonates with sulfamate-derived cyclic imines has been developed, affording sulfamate-fused dihydropyrroles in moderate to good yields.

Journal: :Chemical communications 2006
Stefan C Ritter Burkhard König

A simple flavin-based catalytic system is able to transform light into chemical output with amplified response utilizing a Cu(I)-catalyzed cycloaddition reaction.

E. Zahedi F. Shams S. R. Emamian

In the present work, impact of Lewis acid (LA) catalysts BF3, BCl3, and BBr3 on the kinetics andregioselectivity of 1,3-dipolar cycloaddition (1,3-DC) reaction between azidobenzene and acroleinwas theoretically studied using B3LYP/6-31G* level. Our results indicate while the uncatalyzed 1,3-DC reaction under investigation takes place via a non-polar, non-regioselective, and lowasynchronous proc...

Journal: :Chemical communications 2015
Yuxiao Liu Yongming Deng Peter Y Zavalij Renhua Liu Michael P Doyle

A highly stereoselective desymmetrization reaction of δ,δ-diaryl-α-diazo-β-ketoesters catalyzed by chiral dirhodium carboxylates forms aromatic cycloaddition products in up to 97% ee.

Journal: :Chemistry 2008
Dhevalapally B Ramachary Kinthada Ramakumar Vidadala V Narayana

1,2,3-Triazoles are an important class of heterocycles, which display very large spectrum of biological activities and are widely used as pharmaceuticals and agrochemicals. Compounds containing 1,2,3-triazoles have also found industrial applications as corrosion inhibitors, lubricants, dyes, and photostabilizers. As such, the development of new and more general methods for their preparation is ...

2015
Valerie A. Schmidt Jordan M. Hoyt Grant W. Margulieux Paul J. Chirik

Aryl-substituted bis(imino)pyridine cobalt dinitrogen compounds, ((R)PDI)CoN2, are effective precatalysts for the intramolecular [2π + 2π] cycloaddition of α,ω-dienes to yield the corresponding bicyclo[3.2.0]heptane derivatives. The reactions proceed under mild thermal conditions with unactivated alkenes, tolerating both amine and ether functional groups. The overall second order rate law for t...

Journal: :Molecules 2017
Daniel A W Ross Dan Preston James D Crowley

A new "click" ligand, 2,6-bis(1-(pyridin-4-ylmethyl)-1H-1,2,3-triazol-4-yl)pyridine (L) featuring a tridentate 2,6-bis(1,2,3-triazol-4-yl)pyridine (tripy) pocket and two pyridyl (py) units was synthesized in modest yield (42%) using the copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The coordination chemistry of the ligand with silver(I) and iron(II) ions was examined using a ...

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