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%。
[EN] SOLVENTS<br/>[FR] SOLVANTS
申请人:BIONIQS LTD
公开号:WO2009034329A1
公开(公告)日:2009-03-19
There is described the use of a protic ionic liquid comprising a trialkylammonium salt as a solvent.
Lithium aluminum hydride-N-methylpyrrolidine complex. 1. Synthesis and reactivity of lithium aluminum hydride-N-methyplyrrolidine complex. An air and thermally stable reducing agent derived from lithium aluminum hydride
作者:Joseph C. Fuller、Eric L. Stangeland、Thomas C. Jackson、Bakthan Singaram
DOI:10.1016/s0040-4039(00)76746-3
日期:1994.3
A 1:1 lithiumaluminum hydride-N-methylpyrrolidine complex (LAHNMP), obtained by the reaction of lithiumaluminumhydride with N-methylpyrrolidine, is a powerful reducing agent, comparable to lithiumaluminumhydride in its reducing properties. LAHNMP reduces esters, lactones, anhydrides and carboxylic acids to the corresponding alcohols. Test reductions show that LAHNMP also reduces a wide range of
Gemini basic ionic liquid as bi-functional catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones at room temperature
作者:Apurba Dutta、Krishnaiah Damarla、Arvind Kumar、Prakash J. Saikia、Diganta Sarma
DOI:10.1016/j.tetlet.2019.151587
日期:2020.3
A cascade synthesis of 2,3-dihydroquinazolin-4(1H)-ones has been developed from 2-aminobenzonitriles and carbonyl analogues using Gemini basic ionicliquid as green catalyst cum solvent at roomtemperature. Both aldehydes and ketones were condensed with 2-aminobenzonitriles affording good to excellent yields of products. Moreover, the ionicliquids can be reused up to 5th cycle without significant
Reaction of Lithium Diethylamide with an Alkyl Bromide and Alkyl Benzenesulfonate: Origins of Alkylation, Elimination, and Sulfonation
作者:Lekha Gupta、Antonio Ramírez、David B. Collum
DOI:10.1021/jo101505x
日期:2010.12.17
examine reactions of lithium diethylamide in tetrahydrofuran (THF) with n-dodecyl bromide and n-octyl benzenesulfonate. The alkyl bromide undergoes competitive SN2 substitution and E2 elimination in proportions independent of all concentrations except for a minor medium effect. Rate studies show that both reactions occur via trisolvated-monomer-based transition structures. The alkyl benzenesulfonate undergoes
结合使用 NMR、动力学和计算方法来检查二乙胺锂在四氢呋喃 (THF) 中与正十二烷基溴和正辛基苯磺酸盐的反应。烷基溴以与所有浓度无关的比例进行竞争性 S N 2 取代和 E2 消除,除了轻微的中等影响。速率研究表明,这两种反应都是通过基于三溶剂化单体的过渡结构发生的。烷基苯磺酸盐经历竞争性 S N 2 取代(次要)和 N-磺化(主要),在低 THF 浓度下促进 N-磺化。在S Ñ2 取代显示通过二溶剂化单体进行,计算表明涉及环状过渡结构。主要的 N-磺化遵循基于二溶剂化二聚体的过渡结构,计算表明为双环 [3.1.1] 形式。两个反应的不同 THF 和二乙胺锂顺序解释了观察到的浓度依赖性化学选择性。