Copper(I)-Catalyzed [3+2] Cycloaddition/Ring-Opening Rearrangement/[4+2] Cycloaddition/Aromatization Cascade: An Unprecedented Chemo- and Stereoselective Three Component Coupling of Sulfonyl Azide, Alkyne and N-Arylidenepyridin-2- amine to Pyrido[1,2-a]py
作者:Kayambu Namitharan、Kasi Pitchumani
DOI:10.1002/adsc.201200654
日期:2013.1.14
construction of diversely functionalized pyrido[1,2‐a]pyrimidin‐4‐imines via copper(I)‐catalyzed [3+2] cycloaddition/ring‐opening rearrangement/[4+2] cycloaddition/aromatization cascade of sulfonyl azides, alkynes and N‐arylidenepyridin‐2‐amines under mild reaction conditions is reported. In addition, the catalytic activity of copper(I)‐modified zeolite, a recyclable, heterogeneous catalyst is also investigated
Half-sandwich Ru(<scp>ii</scp>) arene complexes bearing benzimidazole ligands for the <i>N</i>-alkylation reaction of aniline with alcohols in a solvent-free medium
investigated. For this purpose, a new series of half-sandwich ruthenium(II) complexes bearing N-coordinated benzimidazole complexes have been synthesized and fully characterized by FT-IR, 1H NMR and 13C NMR spectroscopies. Additionally, the structures of the complexes 2a–2e have been characterized by X-ray crystallography. All new complexes were investigated for their catalytic activities in the alkylation
在本文中,使用借氢方法研究了胺与醇衍生物的直接N-烷基化反应。为此,合成了一系列新的带有 N 配位苯并咪唑配合物的半夹心钌 ( II ) 配合物,并通过 FT-IR、1 H NMR 和13 C NMR 光谱进行了充分表征。此外,配合物2a-2e的结构已通过 X 射线晶体学表征。研究了所有新配合物在胺与醇衍生物的烷基化反应中的催化活性。发现在无溶剂介质中的烷基化反应是有效且有选择性的。
Novel one-pot pseudo four component reaction: expeditious synthesis of functionalized imidazo[1,2-a]pyridines
作者:Haleh Sanaeishoar、Roya Nazarpour、Fouad Mohave
DOI:10.1039/c5ra10891h
日期:——
A new and efficient one-pot synthesis of imidazo[1,2-a] pyridines is described. A C-3 imine substituent was installed on the imidazopyridine framework under mild conditions to form the corresponding products in good to excellent yields.
The present report highlights a magnetic nano-Fe3O4–KHSO4·SiO2 catalyzedsynthesis of imidazo[1,2-a]pyridines. The synthetic strategy adopted is expedient, versatile, and offers good to excellent yields from readily available starting materials.
Synthesis of mono- and bisorganophosphorus substituted amides of unsaturated carboxylic acids with PCHNC(O) and antioxidant fragments
作者:Andrey A. Prishchenko、Mikhail V. Livantsov、Olga P. Novikova、Ludmila I. Livantsova、Valery S. Petrosyan
DOI:10.1002/hc.20748
日期:——
convenient methods for the synthesis of newmono- and bisorganophosphorus substituted amides of unsaturated carboxylic acids with PCHNC(O) and antioxidant fragments, starting from Arbuzov reaction of the highly reactive adducts of corresponding imines and acyl chlorides with trimethylsilyl phosphites are proposed. Some properties of the new synthesized mono- and bisorganophosphorus substituted amides are