160726-74-9Relevant academic research and scientific papers
Synthesis and characterization of a new polyaminocarboxylic macrocyclic ligand and its non-ion gadolinium complex. In vitro relaxivity studies at 0.2 T
Martínez, Mario D.,Rustoy, Eduardo M.,Raggio, Norberto,Burton, Gerardo
, p. 110 - 113 (2015)
In this study a novel ligand with three carboxylic groups (H3L1) was synthesized. Its non-ion complex with GdL1 holding promise of magnetic resonance imaging (MRI) was synthesized, and the relaxivity of the complex determi
Synthesis of novel lariat azathia crown macrocycles containing two triazole rings and bis crown macrocycles containing four triazole rings
Abbas, Ashraf A.
, p. 1541 - 1548 (2004)
The 13-hydroxy macrocycles 7a-d were prepared in 40-50% yields by the condensation of 1,ω-bis(4-amino-1,2,4-triazol-3-ylsulfany)alkanes 2a-d with 1,3-bis(2-formyphenoxy)-2-propanol (9). Acylation of 7a-d with 2-chloroacetylchloride gave the corresponding
Polymer-supported macrocyclic Schiff base palladium complex: An efficient and reusable catalyst for Suzuki cross-coupling reaction under ambient condition
He, Ying,Cai, Chun
, p. 678 - 683 (2011)
Polymer-supported macrocyclic Schiff base palladium complex was prepared and characterized. The catalyst exhibits excellent catalytic activity and stability for Suzuki cross-coupling reaction under ambient condition. Various aryl bromides were coupled with aryl boronic acids in DMF/H2O, under air, in the presence of 0.1 mol% of the catalyst to afford corresponding cross-coupled products in high yields within 20-30 min. Furthermore, the heterogeneous catalyst can be readily recovered by simple filtration and reused several times without significant loss in its activity.
Synthesis, molecular modeling and spectroscopic characterization of nickel(II), copper(II), complexes of new 16-membered mixed-donor macrocyclic schiff base ligand incorporating a pendant alcohol function
Chandra, Sulekh,Ruchi,Qanungo, Kushal,Sharma, Saroj K.
, p. 1326 - 1330 (2011)
Complexes of Cu(II) and Ni(II) of the composition [M(L)X] [where M = Ni(II), Cu(II) and X = Cl-, NO3-, CH 3COO-] were synthesized with 1,5-dioxo-9,10-diaza-3,ol- tribenzo-(7,6,10,11,14,15) peptadecane
In order to rhodamine fluorophore as a matrix of the fluorescent probe and its preparation method
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Paragraph 0029; 0034, (2017/08/25)
The invention relates to a fluorescent probe with a rhodamine fluorophore as a matrix and a preparation method of the fluorescent probe. The fluorescent probe has a structural formula as shown in the specification. The preparation method of the fluorescen
Synthesis and characterization of macrocyclic compounds with a hydroxyl functional group
Ou, Min,Zhu, Chun,Zhang, Qi-Long,Zhu, Bi-Xue
, p. 869 - 872 (2013/09/24)
A novel [1+1] Schiff-base macrocyclic compound 3 has been synthesized from precursor 1, 1,3-bis(2′-formylphenoxy)-2-propanol, and precursor 2, resorcinol-bis(4-aminophenyl)ether, via condensation and cyclizaction using Ba2+ as template. The macrocycle 3 was further reduced giving saturated macrocycle 4. The structures of 3 and 4 were characterized by elemental analysis, 1H NMR, IR, and MS spectra, and their structures were determined via single crystal X-ray diffraction studies. X-ray diffraction analysis revealed that the macrocyclic compound 3 has a folded conformation, and the corresponding reduced product 4 adopts a twisted and folded conformation due to its flexible nature.
Heterogeneous cyanation reaction of aryl halides catalyzed by a reusable palladium schiff base complex in water
Jiang, Huiliang,Jiang, Jianzhong,Wei, Huixian,Cai, Chun
, p. 1195 - 1199 (2014/01/06)
Heterogeneous cyanation reaction of aryl halides with K4[Fe(CN) 6] was studied over a polymer supported macrocyclic palladium complex. The reaction proceeded smoothly by adding TX100 (2 wt%) in water without organic solvents. The catalyst exhibited effective catalytic activities to afford the corresponding products in good to excellent yields. Furthermore, the catalyst could be easily recovered and reused for several times without a significant loss of its activity. Graphical Abstract: Heterogeneous cyanation reaction of aryl halides with K4[Fe(CN)6] was studied over a polymer supported macrocyclic palladium complex. The reaction proceeded smoothly by adding TX100 (2 wt%) in water without organic solvents. [Figure not available: see fulltext.]
Liquid crystalline properties of dimers having o-, m- and p- positional molecular structures
Park, Joo-Hoon,Choi, Ok-Byung,Lee, Hwan Myung,Lee, Jin-Young,Kim, Sung-Jo,Cha, Eun-Hee,Kim, Dong-Hyun,Ramaraj,So, Bong-Keun,Kim, Kyung-Hwan,Lee, Soo-Min,Yoon, Kuk Ro
experimental part, p. 1647 - 1652 (2012/07/27)
With the objective to design and synthesis of Schiff's base symmetrical liquid crystal dimmers and to study the effect of molecular structure variation (o-ortho, m-meta, p-para) and change in alkoxy terminal chain length on mesomorphic properties of liquid crystals, We have synthesized Schiff base dimers from dialdehyde derivative containing 2-hydroxy-1,3-dioxypropylene as short spacer with aniline derivatives having different lengths of terminal alkoxy chains (n = 5, 7, 9). The chemical structure of the final products was characterized by proton nuclear magnetic resonance (1H NMR) spectroscopy and fourier transform infrared (FT-IR) spectroscopy. The mesomorphic properties and optical textures of the resultant dimers were characterized by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The existence of smectic A phase transition was confirmed by the observation of batonnets and fan shaped textures in optical microscopy when compound were heated from crystalline phase. All of the dimers of this series, with the exception of 2S5 -ortho, -meta, -para, were thermotropic liquid crystal. The compound 2S9 -meta was monotropic, while the rest were enantiotropic. It was found that the change in terminal alkoxy chain length has pronounced effect on the mesomorphic properties. The temperature range of smectic A phase window widens with increasing alkoxy chain length.
Polymer-supported macrocyclic Schiff base palladium complex as an efficient catalyst for the Heck reaction
He, Ying,Cai, Chun
experimental part, p. 799 - 803 (2012/02/16)
A polymer-supported macrocyclic Schiff base palladium complex has been synthesized. In the Heck reaction of aryl iodides and bromides with ethyl acrylate or styrene, the complex has been proved to give the corresponding products in good to excellent yields. The reaction proceeded smoothly in the presence of 0.5 mol% of catalyst in DMF within 1-4 h. Recycling studies have shown that the catalyst can be readily recovered and reused for four cycles with only a slightly decrease in its activity. Copyright
Heterogeneous copper-free Sonogashira coupling reaction catalyzed by a reusable palladium Schiff base complex in water
He, Ying,Cai, Chun
scheme or table, p. 2689 - 2692 (2011/07/07)
Heterogeneous Sonogashira coupling of terminal alkynes with aryl halides was studied over a polymer-supported macrocyclic Schiff base palladium complex. The cross-coupling reaction proceeded smoothly by adding a piperidine in water medium. The catalyst ex
