نتایج جستجو برای: olefins

تعداد نتایج: 2875  

Journal: :Journal of the American Chemical Society 2006
Junliang Zhang Cai-Guang Yang Chuan He

Ph3PAuOTf catalyzes efficient intra- and intermolecular hydroamination of unactivated olefins with sulfonamides.

Journal: :Chemical communications 2007
Yanfeng Jiang Heinz Berke

Re(I) complexes are applied as catalysts for the dehydro-coupling of Me2NH.BH3 and the transfer-hydrogenation of olefins.

Journal: :Chemical communications 2006
Zhibin Zhang Xiang Wang Ross A Widenhoefer

Ethylene, alpha-olefins, and vinyl arenes undergo platinum-catalyzed hydroarylation with substituted indoles in moderate to good yield.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
mostafa feyzi ali akbar mirzaei

a series of x(co, mn)/tio2 catalysts (x=2–12wt.%) containing 25%co and 75%mn were prepared by the co-impregnation method. all prepared catalysts have been tested in fischer-tropsch synthesis for production of c2-c4 olefins. it was found that the catalyst containing 8wt.%(co,mn)/tio2 is an optimal catalyst for production of c2-c4 olefins. the effect of operation conditions such as the h2/co mola...

Journal: Nanochemistry Research 2017

In this study, a new recoverable catalyst for the epoxidation of olefins was developed using a layered polysiloxane as a support for immobilizing  (salen) molybdenum(VI) complex by electrostatic interaction between the surface of the solid support and the electrically charged molybdenum complex. Characterization of the heterogeneous catalyst by Fourier transform infrared, XRD,1H NMR,...

Journal: :journal of sciences, islamic republic of iran 2014
a. abbasi m. najafi m. masteri-farahani v. h. rodrigues

a two-dimensional nanolayered polyoxomolybdate, [4,4´-h2bipy] [mo7o22].h2o (1), where 4,4´-bipy = 4,4´-bipyridine, was prepared and characterized by ft-ir and atomic absorption spectroscopies, transmission electron microscopy (tem), x-ray single crystal and powder diffraction (xrd), and thermogravimetric analysis. the catalytic performance of 1 was assessed in the epoxidation of some olefins em...

2012
Nianhong Lu Lihong Wang Zhanshan Li Wei Zhang

A concise synthesis of 3-(1-alkenyl)isoindolin-1-ones and 5-(1-alkenyl)pyrrol-2-ones has been achieved by the coupling reactions of N-acyliminium ions produced from 3-hydroxyisoindol-1-ones or 5-hydroxy-1-pyrrol-2-ones with unactivated olefins in the presence of BF(3)·OEt(2) at room temperature. For most of the olefins, the reactions afforded the C(sp3)-C(sp2) cross-coupling products, but for t...

Journal: :Chemical communications 2015
Yasuhiro Yamashita Liang Cheng Nam Mark J Dutton Susumu Yoshimoto Shū Kobayashi

Catalytic asymmetric endo-selective [3+2] cycloaddition reactions of Schiff bases of α-aminophosphonates with olefins are described. While the efficient asymmetric synthesis of several phosphonate analogues of proline derivatives is important in bioorganic chemistry, a direct catalytic method to prepare optically active endo [3+2] cycloadducts of α-aminophosphonates with olefins has never been ...

Journal: :Journal of the American Chemical Society 2003
Yong Cui Chuan He

A unique disilver(I) compound is an efficient catalyst for aziridination of olefins.

Journal: :Chemical communications 2007
Katie L Klotz Luke M Slominski Anthony V Hull Victoria M Gottsacker Rubén Mas-Ballesté Lawrence Que Jason A Halfen

Iron(II) complexes of polydentate nitrogen donor ligands catalyze the rapid aziridination of olefins by PhINTs.

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