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。
Reactions of benzyl alcohols with HI in solvent-free conditions were examined. Three types of reactions (iodination, reduction, and ring formation) occurred depending on the degree of crowding around the benzyl position and the benzylic stabilization of substrates. Results also showed that the ring formation to give indanes proceeded efficiently when HI was used, and that compounds with electron-rich
Direct conversion of alcohols into the corresponding iodides
作者:Reni Joseph、Pradeep S. Pallan、A. Sudalai、T. Ravindranathan
DOI:10.1016/0040-4039(94)02315-3
日期:1995.1
A mild and effective procedure for directly converting secondary, tertiary and benzylic alcohols into the corresponding iodides is described using I2 in refluxing petroleum ether. The reaction proceeds with inversion of configuration.
Diphosphorus tetraiodine (P2I4) a valuable reagent for regioselective synthesis of iodoalkanes from alcohols
作者:M. Lauwers、B. Regnier、M. Van Eenoo、J.N. Denis、A. Krief
DOI:10.1016/s0040-4039(01)86222-5
日期:1979.1
Primary, secondary and tertiary alcohols are transformed regioselectively and in high yield of alkyliodides by P2I4 in CS2 and at 20°C.
P 2 I 4在CS 2中和20°C时,伯,仲和叔醇区域选择性地转化,并以高收率的烷基碘化物转化。
A mild and highly chemoselective iodination of alcohol using polymer supported DMAP
作者:DIPARJUN DAS、JASHA MOMO H ANAL、LALTHAZUALA ROKHUM
DOI:10.1007/s12039-016-1158-1
日期:2016.11
supported DMAP is used in catalytic amount and is recovered and reused several times. Additionally, this method is highly chemoselective. A mild and highly selective iodination of alcohols using polymer supported 4-(Dimethylamino)pyridine (DMAP) in catalytic amount is reported. The basecatalyst can be easily recovered by simple filtration and reused several times without appreciable loss in activity.
Efficient Method for Iodination of Alcohols using KI/Silica Sulfuric Acid (SSA)
作者:Abdol R. Hajipour、Amin Zarei、Aronold E. Ruoho
DOI:10.1080/00397910500503421
日期:2006.5
Abstract A straightforward and effective procedure for the conversion of benzylic and allylicalcohols to the corresponding iodides using KI/SSA in acetonitrile at room temperature.