A Direct and Efficient Synthetic Method for Nitriles from Ketones
摘要:
Cyclic cyano derivatives 3 were obtained by the reaction of Me3SiCN/ZnI2 with the cyclic ketones 2 which gave the trimethylsilyloxy nitriles 4. They were directly transformed to cyano derivatives 3 (70-80% yield) by the reductive reagent Me3SiCl-NaI in acetonitrile in the presence of H2O.
合成并表征了稀土金属(Y,La,Sm和Lu)与手性三齿酰胺基芴基配体的配合物。在非常温和的条件下,这些络合物在催化非活化烯烃的分子内加氢胺化和酮的氰基甲硅烷基化方面均显示出高效率,但是,没有实现对映体控制。反应过程的1 H NMR监测表明,芴基部分的弱配位能力可能是造成这种转化中手性配合物缺乏不对称诱导能力的原因。
A structurally characterized cationic aluminium complex [(AT)Al(DMAP)]+[OTf]- (3) stabilized through less bulky aminotroponate (AT) ligand is reported (DMAP = 4-(dimethylamino)pyridine). It works as an excellent mononuclear main-group catalyst (1 to 2 mol%) for the cyanosilylation of a variety of aldehydes and ketones by consuming just 5 to 30 min at room temperature.
Efficient, Rapid and Solvent-free Cyanosilylation of Aldehydes and Ketones Catalyzed by SbCl<sub>3</sub>
作者:S.A. Pourmousavi、H. Salahshornia
DOI:10.5012/bkcs.2011.32.5.1575
日期:2011.5.20
cyanohydrins. Among them, the cyanosilylation of carbonylcompounds using trimethylsilyl cyanide (TMSCN) is widely utilized for the synthesis of cyanohydrins. Several reagents including Lewis acids, Lewis bases, metal alkoxides, bifunctional catalysts, iodine and inorganic salts have been found to effectively transfer the cyano group from TMSCN to carbonylcompounds. Various types of Lewis acids such as AlCl3
A Family of Highly Stable Lanthanide Metal−Organic Frameworks: Structural Evolution and Catalytic Activity
作者:Mikaela Gustafsson、Agnieszka Bartoszewicz、Belén Martín-Matute、Junliang Sun、Jekabs Grins、Tony Zhao、Zhongyue Li、Guangshan Zhu、Xiaodong Zou
DOI:10.1021/cm100503q
日期:2010.6.8
homeotypic porous lanthanide metal−organicframeworks (MOFs), [Ln(btc)(H2O)]·guest (Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), Ho (6), Er (7), and Yb (8); guest: DMF or H2O) was synthesized. The structures of the as-synthesized compounds are tetragonal and contain 1D channels with accessible lanthanide ions. In situ single crystal X-ray diffraction shows that 1 undergoes a single-crystal to polycrystalline to
A novel silver(<scp>i</scp>)-Keggin-polyoxometalate inorganic–organic hybrid: a Lewis acid catalyst for cyanosilylation reaction
作者:Tuo-Ping Hu、Ya-Qin Zhao、Kai Mei、Shu-Jie Lin、Xing-Po Wang、Di Sun
DOI:10.1039/c5ce00953g
日期:——
polyoxometalate (POM) hybrid material based on a Keggin polyanion and silver(I)–organic sheet, namely, [Ag4(apym)4(SiW12O40)]n (1), where apym = 2-aminopyrimidine, has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, thermal gravimetric analysis, powder X-ray diffraction and single-crystal X-ray diffraction. In the structure of 1, polyanions link 2D 3-connected
一种基于Keggin聚阴离子和银(I)有机薄片的新型多金属氧酸盐(POM)杂化材料,即[Ag 4(apym)4(SiW 12 O 40)] n(1),其中apym = 2-aminopyrimidine,已在水热条件下合成,并通过元素分析,红外光谱,热重分析,粉末X射线衍射和单晶X射线衍射进行了表征。在1的结构中,聚阴离子连接2D 3-连接的4·8 2 -fes Ag I-有机薄片,以生成3D复杂框架。而且1的催化性能 已经在温和的条件下测试了对羰基化合物的氰基甲硅烷基化的反应,显示出较高的周转次数和周转频率。
A dual-functional Cd(<scp>ii</scp>)–organic-framework demonstrating selective sensing of Zn<sup>2+</sup> and Fe<sup>3+</sup> ions exclusively and size-selective catalysis towards cyanosilylation
A dual-functional metal–organic-framework can selectively sense Zn2+ and Fe3+ ions over mixed metal ions and displays size-selective catalysis towards cyanosilylation of aldehydes.