Grafting of copper(II) Schiff base complex on functionalized multi-wall carbon nanotubes: Synthesis, characterization and catalytic aziridination of olefins
摘要:
In this study, hydroxyl functionalized copper(II) Schiff-base; [Cu((OH)(2)-salophen)], [(OH)(2)-salophen] = (N,Ni-bis(4-hydroxysalicylidene) phenylene-1,2-diamine); has been covalently anchored on modified multi-wall carbon nanotubes (MWNTs); [Cu((OH)(2)-salophen)@MWNTs. The new modified MWNTs have been characterized by transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, UV-visible spectroscopy, diffuse reflectance, Fourier transform infrared spectroscopy and elemental analysis. The results suggest that the symmetrical Schiff-base is a bivalent anion with tetradentate N2O2 donors derived from the phenolic oxygen and azomethine nitrogen. MWNTs covalently anchored copper(II) complex catalyze the aziridination of alkenes employing [N-(p-tolylsulfonyl)imino]phenyliodinane (PhI=NTs) as the nitrogen source. (C) 2015 Elsevier B.V. All rights reserved.
Organo-Catalytic Synthesis of 1,3-Thiazole Derivatives
作者:Arash Khalaj、Mehdi Khalaj
DOI:10.3184/174751916x14656621014049
日期:2016.7
An efficient synthesis of 1,3-thiazolidine derivatives has been achieved in which 2-pyridinecarboxaldehyde oxime was employed as a base catalyst to effect cyclisation between aziridines and CS2 in DMF at 40 °C. A similar reaction between aziridines and thiocyanates yielded 1,3-thiazoline-2-imine derivatives
Organocatalytic one-pot synthesis of functionalized 1,3-oxathiolanes and 1,3-thiazolidines
作者:Majid Ghazanfarpour-Darjani、Alieh Khodakarami
DOI:10.1007/s00706-015-1543-3
日期:2016.4
AbstractAn efficient organocatalytic approach for the synthesis of 1,3-oxathiolanes and 1,3-thiazolidines is reported. In this methodology, conjugated base of nitromethane was employed as a potential organocatalyst to promote cyclization reaction between strained heterocyclic compounds and heterocumulenes at ambient conditions. Graphical abstract
Tin(II) iodide selectively catalyzes reactions of alkenes in acetonitrile to afford the corresponding aziridines by the use of one equimolar amount of Chloramine-T [Ts(Cl)N-] at room temperature and to afford the corresponding 1,2-diamines by the use of excess Chloramine-T at 50 degrees C.
Tributylphosphine-Catalyzed Cycloaddition of Aziridines with Carbon Disulfide and Isothiocyanate
作者:Jing-Yu Wu、Zhi-Bin Luo、Li-Xin Dai、Xue-Long Hou
DOI:10.1021/jo801703h
日期:2008.11.21
Aziridines underwent cyclization reaction with carbon disulfide and isothiocyanate in the presence of organophosphine to afford thiazolidinone derivatives in good to high yields. The mechanistic study revealed that organophosphine serves as a catalyst in the reaction.