The Addition of Trimethylsilyl Cyanid to Carbonyl Compounds Using Yb(OTf)<sub>3</sub> as Lewis Acid Catalyst
作者:Yang Yang、Dong Wang
DOI:10.1055/s-1997-1071
日期:——
Yb(OTf)3 was found to be an effective catalyst in the addition of TMSCN to various carbonyl compounds. Highly chemoselective process was observed in the reactions of α-keto aldehyde acetals. Catalyst Yb(OTf)3 is tolerant to the hydroxy group of glyoxylate hydrates used. Catalytic diastereoselective trimethylsilylcyanation of chiral aldehydes and cyanation of glyoxylate hydrates can be carried out under mild condition with moderate de.
show that commercially available nanoceria catalyzes the cyanosilylation of different ketones (21 examples) at temperatures between 0 and 50 °C, in high yields, under solventless conditions if required. The nanoceria network atoms act in a cooperative way to provide a bifunctional acid-base solid catalyst for the cyanosilylation reaction. The amorphization of nanoceria during reaction, due to acid release
A Convenient One-Pot Cyanosilylation of Aldehydes and Ketones Using Potassium or Sodium Cyanide Impregnated on Amberlite XAD Resin and Trimethylsilyl Chloride
作者:Kazuaki Sukata
DOI:10.1246/bcsj.60.3820
日期:1987.10
In the cyanosilylation of benzaldehyde, the combination of potassium or sodium cyanide impregnated on Amberlite XAD resin and trimethylsilyl chloride has been found to be a good one-pot cyanosilylation agent. Although acetonitrile is the best solvent, substantial yields of the product is obtained even in a nonpolar solvent or without any solvent. In the reaction with other aldehydes or ketones, this
Based on the confinement of Pickering emulsion droplets, a novel method to “immobilize” IL catalysts has been developed successfully for continuous-flow cyanosilylation reaction.
A novel yttrium-based metal–organic framework for the efficient solvent-free catalytic synthesis of cyanohydrin silyl ethers
作者:Estitxu Echenique-Errandonea、Juana M. Pérez、Sara Rojas、Javier Cepeda、José M. Seco、Ignacio Fernández、Antonio Rodríguez-Diéguez
DOI:10.1039/d1dt01953h
日期:——
variable dimensions. This assembled set has shown to possess a fascinating catalytic activity for the cyanosilylation of a broad range of aldehydes and ketones with exceptional recyclability, a solvent-free medium, and one order of magnitude lower catalyst loading compared to all related lanthanide-based MOFs described so far in the literature.
已经制备了一种新的多孔金属有机骨架 (MOF),其化学式为 [Y 5 L 6 (OH) 3 (DMF) 3 ]·5H 2 O ( 1 )(其中 L = 3-氨基-4-羟基苯甲酸酯)通过溶剂热法。结构表征表明,该材料由坚固的三维金属有机框架 (MOF) 组成,其中生长的团簇由 Y( III) 和氢氧根阴离子通过配体相互连接,产生具有可变尺寸的互连微通道的开放结构。与所有相关的基于镧系元素的 MOF 相比,该组装组已显示出对广泛范围的醛和酮的氰基硅烷化具有出色的可回收性、无溶剂介质和低一个数量级的催化剂负载的迷人催化活性远在文献中。