通过可见光进行工程光氧化还原触发的化学转化已成为有机合成领域的新兴领域。但是,大多数成熟的光催化剂都是基于与贵金属和有机配体有关的过渡金属络合物或光敏有机染料,大大阻碍了可以提供更好的稳定性和耐久性的纯无机分子光催化剂的开发。在这里,我们发现安德森多金属氧酸盐(POM)Na 4 [NiMo 6 O 18(OH)6 ](1)由纯的无机骨架组成,该骨架由中心的Ni II核构建而成,并由六个Mo VI O 6支撑。无机支架/配体,可用作强大的光催化剂。在可见光(> 400 nm)照射下,该化合物可以高效催化多种反应,包括氯化物与胺的氧化交叉偶联反应,以及使用分子氧的氯化物氧化,从而提供多种亚胺,醛和酮,分别具有高选择性和高收率。由于具有强大的无机骨架,该催化剂在催化过程中表现出出色的稳定性和可重复使用性,而催化活性几乎没有损失,因此提供了一种无需使用复杂的有机配体和昂贵的贵金属基光敏剂的替代方案。
A practical, efficient and environmentally benign catalytic protocol for the oxidative cross-coupling reaction of halides with amines, oxidative self-coupling of amines and oxidation of halides was developed with inorganic-ligand supported ZnPOM (NH4)4[ZnMo6O18(OH)6] using molecular oxygen. This method mainly utilizes an inorganic polymolybdate ligand to support the Zn2+ ion, avoiding the use of complicated
利用无机配体负载的ZnPOM(NH 4)4 [ZnMo 6 O 18( OH)6 ]使用分子氧。该方法主要利用无机多钼酸盐配体来支撑Zn 2+离子,避免了使用复杂的有机配体。
Cobalt-Catalyzed Acceptorless Alcohol Dehydrogenation: Synthesis of Imines from Alcohols and Amines
作者:Guoqi Zhang、Susan K. Hanson
DOI:10.1021/ol303479f
日期:2013.2.1
A cobalt catalyst has been developed for the acceptorlessdehydrogenation of alcohols and applied to synthesize imines from alcohols and amines. Deuterium labeling studies suggest that the reaction proceeds by an initial reversible alcoholdehydrogenation step involving a cobalt hydride intermediate.
Organoaminosilanes, such as without limitation di-iso-propylaminosilane (DIPAS), are precursors for the deposition of silicon containing films such as silicon-oxide and silicon-nitride films. Described herein are methods to make organoaminosilane compounds, or other compounds such as organoaminodisilanes and organoaminocarbosilanes, via the catalytic hydrosilylation of an imine by a silicon source comprising a hydridosilane.
SYNTHESIS OF SOME NEW CYCLIC AMINOPHOSPHONATES AND THEIR PHYSIOLOGICAL ACTIVITIES
作者:J. S. Wieczorek、R. Gancarz、K. Bielecki、E. Grzyś、J. Sarapuk
DOI:10.1080/10426500108040237
日期:2001.8.1
The synthesis of 19 newly synthesized cyclic aminophosphonic acid derivatives was described and their biological activity studied. It was found, as in the case of the previously described series of acyclic analogues, that the phytotoxicity of the compounds, tested on aquatic plant Spirodela oligorrhiza depended mainly on their hydrophobic parameters. The most pronounced phytotoxicity, the measure of which was concentration of aminophosphonates causing 50% inhibition of plant growth (EC50), exhibited compounds with not too long hydrocarbon substituent on the nitrogen atom (8-10 carbon atoms) and branched propyl groups on the phosphorus atom. The test had preliminary character and permitted to eliminate the less promising compounds for further studies.
Heiszwolf,G.J.; Kloosterziel,H., Recueil des Travaux Chimiques des Pays-Bas, 1970, vol. 89, p. 1217 - 1228