163231-36-5Relevant academic research and scientific papers
N ortho acyl substituted nitrogen-containing heterocyclic compound and process for preparing aminal iron (II) complexes thereof
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Page/Page column 29-30, (2016/04/20)
Provided are a process for preparing an N ortho acyl substituted nitrogen-containing heterocyclic compound and an aminal iron (II) complex thereof, and the use of the complexes obtained by the process in an olefin oligomerization catalyst. The N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is for example 2-acyl-1,10-phenanthroline or 2,6-diacetyl pyridine as shown in formula b, and the N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is produced by a reaction of a precursor thereof in a substituted or unsubstituted nitrobenzene. Preferably the precursor shown in formula I in the present invention is produced by 1,10-phenanthroline reacting with trialkyl aluminum, or a halogenoalkyl aluminum RnAIXm, or a substituted or unsubstituted benzyl lithium Ph′CH2Li, followed by hydrolysis. The preparation method provided in the present invention has a few synthetic steps, an easy process, a low toxic effect, and reduces the preparation costs of the catalyst, and has a promising outlook in the industrial application.
A new practical approach towards the synthesis of unsymmetric and symmetric 1,10-phenanthroline derivatives at room temperature
Cheng, Yongfeng,Han, Xuesong,Ouyang, Huangche,Rao, Yu
supporting information; experimental part, p. 2906 - 2908 (2012/04/23)
An efficient method towards synthesis of 1,10-phenanthrolines is described. Through Lewis acid-catalyzed annulation reaction between 3-ethoxycyclobutanones and 8-aminoquinolines, a variety of unsymmetric and symmetric 1,10-phenanthroline derivatives were
Proton-Transfer Processes in Well-Defined Media: Experimental Investigation of Photoinduced and Thermal Proton-Transfer Processes in Single Crystals of 2-(2,4-Dinitrobenzyl)pyridine Derivatives
Scherl, Michael,Haarer, Dietrich,Fischer, Jean,DeCian, Andre,Lehn, Jean-Marie,Eichen, Yoav
, p. 16175 - 16186 (2007/10/03)
A detailed spectroscopic study of photoinduced and thermally activated proton-transfer processes for a series of different crystals of 2-(2,4-dinitrobenzyl)pyridine derivatives has been performed.The quantitative analysis of ground- and excited-state activation barriers and preexponential factors in deuterated and nondeuterated crystals shows clearly that the observed photochromism is linked to a proton-transfer process.Furthermore, it is clearly seen that the supramolecular environment of the transferred proton participates in the proton-transfer process.These supramolecular effects control the relative rates and efficiencies of the observed proton-transfer processes in both the ground and excited state, yielding, at room temperature, photoproducts having lifetimes ranging between hours and weeks.At least two proton-accepting groups may be active in the abstraction of the proton from its relatively stable benzylic position.Additionally, low-temperature measurements of proton-transfer processes show that tunneling processes prevail at temperatures below 100 K only in the excited state.No evidence for tunneling could be found for ground-state processes.
Long-lived Photoinduced Proton Transfer Processes
Eichen, Yoav,Lehn, Jean-Marie,Scherl, Michael,Haarer, Dietrich,Casalegno, Roger,et al.
, p. 713 - 714 (2007/10/02)
Irradiation of the phenanthroline-dinitrobenzyl compound 3 generates, via a photoinduced proton transfer process, a long-lived tautomer having a lifetime about 5*103 times longer than that of the parent compound 1a.
