نتایج جستجو برای: cyclooctene

تعداد نتایج: 246  

Journal: :Journal of the American Chemical Society 2005
Xiang Wang Benjamin S Lane Dalibor Sames

Ar-Rh(III) pivalate complexes assembled in situ from the reaction of [RhCl(coe)2]2 (coe = cis-cyclooctene), [p-(CF3)C6H4]3P, and CsOPiv effectively catalyzed the direct C-arylation of free (NH)-indoles and (NH)-pyrroles in good yields and with high regioselectivity. The reaction displayed excellent functional group compatibility and low moisture sensitivity. Kinetics studies support a mechanism...

Journal: :Journal of materials chemistry. A, Materials for energy and sustainability 2022

The single-atom Co anchored on N-doped carbon supports with a multiscale porous structure has been successfully constructed for the epoxidation of cyclooctene 95% yield 1,2-epoxycycloheptane at 140 °C and 0.5 MPa O 2 .

Journal: :Chemical communications 2013
Wenting Liang Cheng Yang Dayang Zhou Hitoshi Haneoka Masaki Nishijima Gaku Fukuhara Tadashi Mori Franca Castiglione Andrea Mele Fabrizio Caldera Francesco Trotta Yoshihisa Inoue

Pyromellitate-bridged cyclodextrin nanosponges (CDNSs) evolved from sol into gel state upon gradual increase of the concentration from 0.2 to 2000 mg mL(-1) in water. The enantiodifferentiating geometrical photoisomerizations of (Z)-cyclooctene and (Z,Z)-1,3-cyclooctadiene sensitized by CDNS at various concentrations were critically affected by the phase transition of CDNS to afford the corresp...

Journal: :Nature chemical biology 2014
Markus Grammel Howard C Hang John R Kirby Joy Sinha Samuel Reyes Justin P Gallivan

Nat. Chem. Biol. 9, 475–484 (2013); published online 18 July 2013; corrected after print 19 December 2013 In the version of this Review Article initially published, a double bond was missing from the chemical structure of the cyclooctene on the left side of the reaction arrow in Figure 1e. The chemical structure has been corrected in the HTML and PDF versions of the article. erratum Designer ba...

2016
Gong Zhang Jie Li Ran Xie Xinyuan Fan Yanjun Liu Siqi Zheng Yun Ge Peng R. Chen

Selective manipulation of protein kinases under living conditions is highly desirable yet extremely challenging, particularly in a gain-of-function fashion. Here we employ our recently developed bioorthogonal cleavage reaction as a general strategy for intracellular activation of individual kinases. Site-specific incorporation of trans-cyclooctene-caged lysine in place of the conserved catalyti...

2017
Arcadio Vázquez Rastislav Dzijak Martin Dračínský Robert Rampmaier Sebastian J Siegl Milan Vrabel

The development of fluorogenic reactions which lead to the formation of fluorescent products from two nonfluorescent starting materials is highly desirable, but challenging. Reported herein is a new concept of fluorescent product formation upon the inverse electron-demand Diels-Alder reaction of 1,2,4,5-tetrazines with particular trans-cyclooctene (TCO) isomers. In sharp contrast to known fluor...

Journal: :Macromolecules 2009
Ron Walker Rosemary M Conrad Robert H Grubbs

The living ring-opening metathesis polymerization (ROMP) of trans-cyclooctene (tCO) was investigated. ROMP of tCO in the presence of PPh(3) in THF leads to the formation of narrowly dispersed polycyclooctene (PCO). The presence of PPh(3) as an additive and the use of THF as a solvent were demonstrated to be necessary to suppress competing secondary metathesis processes in the ROMP of tCO. Under...

2007
Ned A. Stephenson Alexis T. Bell

A detailed investigation was carried out of the effects of porphyrin composition on the activity and selectivity of iron(III) porphyrin catalysts used or the epoxidation of cyclooctene by hydrogen peroxide. Under conditions where the formation of -oxo-dimers can be avoided, the mechanism f cyclooctene epoxidation and hydrogen peroxide decomposition are identical for all of the porphyrin catalys...

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