General, Green, and Scalable Synthesis of Imines from Alcohols and Amines by a Mild and Efficient Copper-Catalyzed Aerobic Oxidative Reaction in Open Air at Room Temperature
A general, green, and scalablesynthesis of the useful imines and α,β-unsaturated imines is successfully achieved by a low-loading and powerful, mild and efficientcopper-catalyzedaerobicoxidativereaction of alcohols and amines in the openair at roomtemperature under base- and dehydrating reagent-free conditions. This practical reaction can use air as the economic and green oxidant, tolerates
Sulfated polyborate: A dual catalyst for the reductive amination of aldehydes and ketones by NaBH4
作者:Prerna Ganwir、Ganesh Chaturbhuj
DOI:10.1016/j.tetlet.2021.153143
日期:2021.6
An efficient, quick, and environment-friendly one-pot reductiveamination of aldehydes or ketones was developed. In ethanol at 70 °C, a imination catalyzed by sulfated polyborate and further reduced by sodium borohydride yields various amines. The present method has many significant benefits, including a shorter reaction time, excellent yields, and a hassle-free, straightforward experimental process
开发了一种高效、快速、环保的醛或酮的单锅还原胺化反应。在 70 °C 的乙醇中,由硫酸化多硼酸盐催化并由硼氢化钠进一步还原生成各种胺。本方法具有许多显着的好处,包括更短的反应时间、优异的产率和轻松、直接的实验过程。由于其灵活性,该反应具有广泛的应用,包括用于还原胺化的仲胺。
An in-depth analysis of the effect of substituents on imines in cycloaddition reactions with nitrosoalkenes
作者:Alka Marwaha、Parvesh Singh、Mohinder P. Mahajan
DOI:10.1016/j.tet.2006.03.047
日期:2006.6
An in-depth experimental and theoretical analysis of the reactions of simple acyclic imines with nitrosoalkenes is reported. The effect of the substituents on nitrogen as well as carbon atom of imines on the cycloaddition pathways followed is systematically explored. The reactions of various functionalized imines with nitrosoalkenes leading to the formation of imidazoles and imidazole-N-oxides have
Nucleophilic Trifluoromethylation of Imines under Acidic Conditions
作者:Vitalij V. Levin、Alexander D. Dilman、Pavel A. Belyakov、Marina I. Struchkova、Vladimir A. Tartakovsky
DOI:10.1002/ejoc.200800820
日期:2008.11
A general method for the trifluoromethylation of imines by using Me3SiCF3 under acidic conditions is described. The reaction is promoted by hydrofluoric acid generated in situ from KHF2 and either TFA or TfOH. A new chemoselectivity pattern was achieved, as the C=N bond was found to be more reactivate than the carbonyl group. The trifluoromethylation reaction is believed to proceed by concerted transfer