Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO<sub>2</sub>
作者:Lina Zhang、Yan Zhang、Youquan Deng、Feng Shi
DOI:10.1039/c5cy00316d
日期:——
photocatalysts for organic reactions. Here, we show the preparation and catalytic performance of a novel TiO2 (P25) supported Cu and Mo photocatalyst (Cu–Mo/TiO2) for N-alkylation of amines with alcohols under UV irradiation at room temperature. A variety of aromatic and aliphaticamines were selectively converted into the corresponding secondary amines or tertiaryamines in moderate to excellent yields
非常需要开发用于有机反应的有效的多相光催化剂。在这里,我们展示了一种新型的TiO 2(P25)负载的Cu和Mo光催化剂(Cu–Mo / TiO 2)的制备和催化性能,该光催化剂在室温下UV辐射下用醇对胺进行N烷基化。在不添加任何助催化剂(例如碱和有机配体)的情况下,将各种芳香族和脂肪族胺以中等至极好的收率选择性地转化为相应的仲胺或叔胺。值得注意的是,该催化体系在含卤素取代基的苯胺与醇的烷基化中是可行的,所需产物的产率高达95%。
Ruthenium-Catalyzed <i>N</i>-Alkylation of Amines with Alcohols under Mild Conditions Using the Borrowing Hydrogen Methodology
作者:Arrey B. Enyong、Bahram Moasser
DOI:10.1021/jo501273t
日期:2014.8.15
Using a simple amino amide ligand, ruthenium-catalyzed one-pot alkylation of primary and secondary amines with simple alcohols was carried out under a wide range of conditions. Using the alcohol as solvent, alkylation was achieved under mild conditions, even as low as room temperature. Reactions occurred with high conversion and selectivity in many cases. Reactions can also be carried out at high temperatures
the copper-catalyzed coupling of aryl iodides with aliphatic amines occurs at room temperature in as little as 1 h. These high reaction rates allow for the coupling of a wide range of aryl and heteroaryl iodides at room temperature. This method is highly tolerant of a number of reactive functional groups, including -Br and aromatic -NH2 as well as phenolic and aliphatic -OH. The high selectivity of
Several new ligands were designed to promote copper-catalyzed Ullman C−N coupling reactions. In this group, 8-hydroxyquinolin-N-oxide was found to serve as a superior ligand for CuBr-catalyzed coupling reactions of aryl iodides, bromides, and chlorides with aliphatic amines and N-heterocycles under a low catalyst loading (1% [Cu] mol). Reactions with the inexpensive catalytic system display a high