10234-40-9Relevant academic research and scientific papers
Azo and azoxythiacrown ethers: Synthesis and properties
Kertmen, Ahmet,Szczygelska-Tao, Jolanta,Chojnacki, Jaros?aw
, p. 10662 - 10668 (2013)
A series of 16- and 18-membered azo- and azoxythiacrown ethers have been synthesized by reductive macrocyclization of the respective bis(nitrophenoxy) oxaalkanes. The aromatic residues located in the polyether region of the molecule were introduced to mac
A new class of flavonoids bearing macrocyclic polyethers by stereoselective photochemical cycloaddition reaction
Ishikawa, Hiroki,Uemura, Naohiro,Taira, Ryo,Sano, Kento,Yoshida, Yasushi,Mino, Takashi,Kasashima, Yoshio,Sakamoto, Masami
, p. 3911 - 3916 (2019)
A new class of flavonoids bearing cyclic polyethers involving a phenyl ring was conveniently provided by the intramolecular photochemical dimerization of 2-chromonecarboxylic esters. Irradiation of 2-chromonecarboxylate with a polyether tethered at both ends promoted intramolecular [2 + 2] cyclobutane formation leading to 14- to 27-membered cyclic polyethers. The efficiency depended on the substituted position of the phenyl ring, with ortho- and meta-substituted derivatives giving cycloadducts in good chemical yields and quantum efficiencies, whereas the para-derivatives were inert toward photolysis. X-ray crystallographic analysis revealed that the stereochemistry of the macrocyclic cycloadducts exhibited C2-symmetry.
Macrocyclic bis-urea receptor: Synthesis, crystal structure and phosphate binding properties
Shu, Xi,Wang, Ruyu,Fan, Yu,Li, Shoujian,Huang, Chao
, p. 729 - 733 (2019)
A macrocyclic bis-urea receptor (L1) and two acyclic bis-urea analogues (L2 and L3) have been synthesized. The crystal structure of L1 was obtained. The experimental results show that the receptor L1 has high selectivity to H2PO4 ?. Meanwhile, compared with the acyclic receptors L2 and L3, L1 has higher binding ability to H2PO4 ?. The results of density functional theory (DFT) calculations deepened our understanding on L1 conformations stability and its anion-binding property.
Copper(ii) and cobalt(ii) complexes based on bis-benzimidazolyl ligand with 1,2-bis(2′-ethoxy)phenyl linker: Synthesis, crystal structure and conformations
Liu, Qing-Xiang,Bi, Yue,Zhao, Xiao-Jun,Zhao, Zhi-Xiang,Wang, Jian-Hua,Wang, Xiu-Guang
, p. 1950 - 1962 (2014)
Seven Cu(ii) and Co(ii) complexes [Co(L)2(H2O) 2]Cl2 (1), [Cu(L)Cl2]2 (2), [Cu(L)(NO3)2]2 (3), [Cu(L)(SO 4)]2 (4), [Co(L)(LA/sub
Revisiting Hydroxyalkylation of Phenols with Cyclic Carbonates
Kao, Shih-Chieh,Lin, Yi-Ching,Ryu, Ilhyong,Wu, Yen-Ku
supporting information, p. 3639 - 3644 (2019/07/10)
Described is a tetrabutylammonium fluoride-mediated hydroxyalkylation reaction of phenols with cyclic carbonates. This operationally simple method enables the synthesis of a variety of aryl β-hydroxyethyl ethers in good to excellent yields with a very small amount of catalyst loading (0.1–1 mol%). Of particular note is the efficient conversion of aromatic diols and phloroglucinol to the corresponding bis- and tris-hydroxyethylated products. To further showcase the versatility of this protocol, guaifenesin was prepared with a single step by the condensation of guaiacol and glycerol carbonate. We also developed a flow ethoxylation process permitting the continuous synthesis of multiflorol. (Figure presented.).
Rapid and scalable synthesis of chiral porphyrin cage compounds
Gilissen, Pieter J.,Swartjes, Anne,Spierenburg, Bram,Bruekers, Jeroen P.J.,Tinnemans, Paul,White, Paul B.,Rutjes, Floris P.J.T.,Nolte, Roeland J.M.,Elemans, Johannes A.A.W.
, p. 4640 - 4647 (2019/07/12)
An improved and scalable synthetic route to chiral porphyrin cage compounds, which will be used as catalytic machines for the encoding of information into polymers, has been developed. The porphyrin cage was made chiral by introducing one or two nitro gro
Two cyclotriveratrylene metal-organic frameworks as effective catalysts for Knoevenagel condensation and CO2 cycloaddition with epoxides
Kang, Da-Wei,Han, Xue,Ma, Xin-Jun,Liu, Ying-Ying,Ma, Jian-Fang
, p. 16197 - 16204 (2018/11/30)
By using a novel imidazole-functional cyclotriveratrylene ligand, two isostructural frameworks, [Cd3(HECTV)(bdc)3]·DMF·6H2O (1) and [Zn3(HECTV)(OH-bdc)3]·3DMF·4H2O (2) (HECTV = 5,6,12,13,19
Formation and uses of europium complexes
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Page/Page column 11, (2017/09/07)
The present invention provides a method of forming an oxidatively-stable aqueous Eu(II) complex by synthesizing ligands that coordinate to large, soft, electron rich metals like Eu(II). The invention also provides an oxidatively stable aqueous Eu(II) complex. The complex can be used for a variety of purposes some of which include, but are not limited to, in paramagnetic chemical exchange saturation transfer, as a medical diagnostic, as a semiconductor, and for use in forming materials.
Synthesis and extraction properties of some lariat ethers derived from the spontaneously resolved guaifenesin, 3-(2-methoxyphenoxy)propane-1,2-diol
Bredikhina, Zemfira A.,Eliseenkova, Rimma M.,Fayzullin, Robert R.,Novikova, Viktorina G.,Kharlamov, Sergey V.,Sharafutdinova, Dilyara R.,Latypov, Shamil K.,Bredikhin, Alexander A.
experimental part, p. 16 - 32 (2011/09/21)
Capable of spontaneous resolution rac-3-(2-methoxyphenoxy)propane-1,2-diol, guaifenesin 1 has been proposed as a cheap and readily available enantiopure precursor for the synthesis of nonracemic crown ethers having ligating OAr and OMe arms (lariat ethers). The crowns studied failed to form stable host/guest complexes with amine hydrochloride salts; the effective complexation was achieved using hexafluorophosphate salts. Moderate enantiomeric recognition of R*NH2·HPF6 was achieved with the lariat ethers 11c. As a whole, the enantioselectivity of the extraction is inversely related to the extractive power of the lariat ether. ARKAT-USA, Inc.
Oxidatively stable, aqueous europium(II) complexes through steric and electronic manipulation of cryptand coordination chemistry
Gamage, Nipuni-Dhanesha H.,Mei, Yujiang,Garcia, Joel,Allen, Matthew J.
supporting information; experimental part, p. 8923 - 8925 (2011/02/23)
A series of cryptands has been prepared and they demonstrate the relationship between oxidative stability of aqueous EuII and ligand properties (see figure). One of these EuII complexes is more stable than FeII in hemoglobin and appears to be the most oxidatively-stable aqueous EuII species known. The high stability of EuII is expected to enable the use of the unique magnetic and optical properties of this ion in vivo.
