Metal free mild and selective aldehyde cyanosilylation by a neutral penta-coordinate silicon compound
作者:V. S. V. S. N. Swamy、Milan Kumar Bisai、Tamal Das、Sakya S. Sen
DOI:10.1039/c7cc03948d
日期:——
This study demonstrates the preparation and structural characterization of a Si(IV) hydride (PhC(NtBu)2SiH(CH3)Cl) (1) and its use as a catalyst for cyanosilylation of a variety of aldehydes. Compound1 represents the first neutral penta-coordinate silicon(IV) species that catalyzes cyanosilylation of aldehydes under mild condition.
Beyond Hydrofunctionalisation: A Well-Defined Calcium Compound Catalysed Mild and Efficient Carbonyl Cyanosilylation
作者:Sandeep Yadav、Ruchi Dixit、Kumar Vanka、Sakya S. Sen
DOI:10.1002/chem.201705795
日期:2018.1.26
Organocalciumcompounds have been reported as efficient catalysts for various transformations, for cases in which one of the substrates contained an E−H (E=B, N, Si, P) bond. Here, we look at the possibility of employing an organocalciumcompound for a transformation in which none of the precursors has a polar E−H bond. This study demonstrates the utilization of a well‐defined amidinatocalcium iodide
Low-valent magnesium(<scp>i</scp>)-catalyzed cyanosilylation of ketones
作者:Weifan Wang、Man Luo、Jia Li、Sumod A. Pullarkat、Mengtao Ma
DOI:10.1039/c8cc00826d
日期:——
The magnesium(I) complex [(XylNacnac)Mg]2 was employed as a highly efficient catalyst for the cyanosilylation of a variety of ketones with trimethylsilyl cyanide under mild conditions. In contrast to the traditional stoichiometric use of magnesium(I) complexes, 1 provides the first example of a truly catalytic application of Mg(I) complexes.
Preparation, Characterization and Catalytic Properties of Polyaniline-Supported Metal Complexes
作者:Boyapati M. Choudary、Moumita Roy、Sarabindu Roy、M. Lakshmi Kantam、Bojja Sreedhar、Karasala Vijay Kumar
DOI:10.1002/adsc.200606077
日期:2006.8
Polyaniline-supported Sc, In, Pd, Os and Re catalysts were prepared by using a simple protocol and the thus prepared catalysts were well characterized using FTIR, XPS, UV-Vis/DRS, TGA-DTA. All the catalysts were successfully employed in a wide range of organic transformations such as cyanation and allylation of carbonyl compound, Suzuki coupling of aryl halides and boronic acids, and, most importantly
The well‐defined three coordinated electronically unsaturated cationic organoaluminum complex [((2,6‐iPr2C6H3N)P(Ph2)}2N)AlMe]+[MeB(C6F5)3]− (1), has been utilized to catalyze the cyanosilylation of aldehydes and ketones undermild and solvent‐free conditions. Moreover, catalyst 1 showed high chemoselective cyanosilylation of aldehydes over ketones, nitriles and olefins. The multinuclear NMR investigations
定义明确的三配位电子不饱和阳离子有机铝络合物[[(2,6 - i Pr 2 C 6 H 3 N)P(Ph 2)} 2 N)AlMe] + [MeB(C 6 F 5)3 ] −(1)已用于在温和无溶剂条件下催化醛和酮的氰基硅烷化反应。此外,催化剂1显示醛在酮,腈和烯烃上的高化学选择性氰基硅烷化。该多核NMR调查显示经由之间路易斯加成物形成的是硅氰化反应进行1 然后激活TMSCN(Si-CN键),然后在活化硅烷的Si中心对羰基氧进行亲核攻击并形成产物。