Herein is described an efficient and chemoselective method for the synthesis of diversely substituted secondary amines in yields up to 98 %. Direct mono-N-alkylation of primary benzylamines and anilines with a wide range of alkyl halides is promoted by a cesium base in the absence of any additive or catalyst. The basicity and solubility of cesium carbonate in anhydrous N,N-dimethylformamide not only
A visible-light-induced cascade Meerwein addition/cyclization of alkenes involving C–F bond cleavage was developed. This method offers a rapid access to azaspirocyclic cyclohexadienones from N-benzylacrylamides via C–F bond cleavage applying H2O as an external oxygen source, allowing for the incorporation of various aromatic moieties originating from aryldiazonium salts.
prepared by the metathetic reaction of trace heavymetals like Cd, Zn, Cu and Hg with two different dithioligands of the formula ML 2 [ M= Cd, Zn, Cu and Hg and L= potassium-1,1-dicyano-2,2-ethylenedithiolate and potassium N-4-fluorobenzyl, N butyldithiocarbamate ] and characterized by elemental analysis, IR, UV-visible, 1H,13C NMR and AAS. AtomicAbsorption Spectrophotometric measurements revealed that
A palladium-catalyzed C–H carbonylation of benzylamines for the synthesis of isoindolinone scaffolds has been developed. This protocol is conducted under gas-free conditions by using benzene-1,3,5-triyl triformate (TFBen) as a convenient CO surrogate, furnishing a variety of isoindolinone derivatives in moderate to high yields (up to 95%).
A sustainable strategic approach for N-alkylation of amines with activation of alcohols triggered via hydrogen auto-transfer reaction using Pd(II) complex: Evidences for metal-ligand cooperativity
new well-defined, air-stable, phosphine free palladium(II) [Pd(L)Cl] (1) catalyst. This catalyst was utilized for N-alkylation of amines and indole synthesis where H2O was found to be the by-product. A broad range of aromaticamines were alkylated using this homogeneous catalyst with a catalyst loading of 0.1 mol%. Greener aromatic and aliphatic primary alcohols were utilized and a hydrogen auto-transfer
这项工作描述了一种新的结构明确、空气稳定、不含磷的钯( II )[Pd( L )Cl]( 1 )催化剂。该催化剂用于胺的N-烷基化和吲哚合成,其中发现 H 2 O 是副产物。使用这种催化剂负载量为 0.1 mol% 的均相催化剂对多种芳香胺进行烷基化。使用更环保的芳香族和脂肪族伯醇,并研究了通过金属-配体合作方法的氢自动转移策略。含抗组胺药分子三苯胺的前体以克级合成,以实现当前合成方法的大规模应用。进行了许多对照实验来研究可能的反应途径,这些实验的结果表明偶氮发色团在催化循环期间作为氢储存库。