27252-69-3

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A severe eye irritant

Upstream product

• 75-21-8 oxirane 
• 74-85-1 ethene 
• 1462-33-5 2-chloroethyl chloromethyl ether 
• 112-27-6 2,2'-[1,2-ethanediylbis(oxy)]bisethanol 
• 123-91-1 1,4-dioxane 
• 7782-50-5 chlorine 
• 17134-17-7 triethylene glycol bis(chloroformate) 
• 19249-03-7 triethylene glycol di-(p-toluenesulfonate) 
• 108213-17-8 2-(2-(2-chloroethoxy)ethoxy)ethyl 4-methylbenzenesulfonate 
• 5197-62-6 2-[2-(chloroethoxy)ethoxy]ethanol 
• 638-56-2 1,11-dichloro-3,6,9-trioxaundecane 
• 3926-62-3 sodium monochloroacetic acid 
• 2615-15-8 pentaethylene glycol 
• 112-60-7 Tetraethylene glycol 

Downstream Products

• 65925-31-7 1-[2-(2-chloro-ethoxy)-ethoxy]-2-(4-tert-pentyl-phenoxy)-ethane 
• 53129-28-5 1,10-diphenyl-1,4,7,10-tetraoxaundecane 
• 5197-25-1 [2-(2-chloro-ethoxy)-ethyl]-(2-pentachlorophenoxy-ethyl)-ether 
• 22366-98-9 N-methyl-8-(methylamino)-3,6-dioxaoctylamine 
• 75507-20-9 <(Benzyloxy)methyl>-12-crown-4 
• 120582-98-1 monoethylene glycol bis(β-diphenylphosphinylethyl) ether 
• 52601-78-2 7,16-bis(p-tolylsulphonyl)-1,4,10,13-tetraoxa-7,16-diazacyclo-octadecane 
• 107089-68-9 (Z)-1,4-Dioxa-7,10-dithia-cyclododec-8-en-8,9-dicarbonitril 
• 138942-20-8 2-(2-Phenoxy-ethoxymethyl)-1,4,7,10-tetraoxa-cyclododecane 
• 138942-16-2 2-[2-(2-Methoxy-phenoxy)-ethoxymethyl]-1,4,7,10-tetraoxa-cyclododecane 
• 136755-47-0 6,7,9,10,12,13-Hexahydro-8,11-dioxa-5,14-diselena-benzocyclododecene 
• 136755-50-5 1,2-Bis-{2-[2-(2-chloro-ethoxy)-ethoxy]-ethylselanyl}-benzene 
• 135617-36-6 4,4'-<(3,6-dioxaoctamethylene)bis(phenylphosphinylidene)>bisbenzo-15-crown-5 
• 143251-87-0 7,16-Dicyclohexyl-1,4,10,13-tetraoxa-7,16-diphospha-cyclooctadecane 

Relevant academic research and scientific papers

Application of Two-Dimensional NMR to the Structure Determination of an Unsymmetrical Monosubstituted Bisporphyrin

The complete assignment of (1)H and (13)C data of an unsymmetrical monosubstitute bisporphyrin based on an extensive application of two-dimensional (1)H-(1)H, (1)H-(13)C and (13)C-(13)C shift spectroscopy is described.The (1)H-(1)H shift correlation through dipolar interaction (2D NOESY) was essential to prove the connection of the alkyl fragments and to distinguish protons spatially close but belonging to different units.The additive structural increments method allowed the assignment of the quatenary carbons of tolyl residues.

Chiral Biphenyl Bis(crown ethers): Synthesis and Resolution

New chiral bis(crown ethers) with a central 2,2',6,6'-tetraoxybiphenyl unit have been prepared and resolved.Their complexing properties and absolute configuration are discussed.

Hydrogel material containing zinc chelate

The invention discloses a hydrogel material containing a zinc chelate. The invention also provides a preparation method of the hydrogel. The hydrogel provided by the invention has hydrophilicity and biocompatibility, realizes long-acting retention and absorption of the zinc element on the body surface, and can be applied to various skin and hair care products.

Polyethylene glycol chain connected dication ionic liquid and preparation method thereof, and SO2 gas trapping method

The invention discloses a polyethylene glycol (PEG) chain connected dication ionic liquid and a preparation method thereof, and an SO2 trapping method. According to the PEG chain linked dication ionicliquid, an ionic liquid composition comprises an anion and a cation; the cation is described in the specification, wherein R is CmH2m+1, m is an integer, m is more than or equal to 0 and less than orequal to 10, and n is an integer and is greater than or equal to 1 and less than or equal to 12. A PEG chain is connected with two imidazole or imidazole analogue biimidazole cations to be matched with different types of anions to form the stable and low-toxicity PEG chain connected functional dication ionic liquid, and the PEG chain connected functional dication ionic liquid is used for SO2 treatment, so that an efficient and reversible absorption effect can be achieved.

Crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives

The invention discloses a crown ether type ionic liquid based on imidazole, benzimidazole and their derivatives. Cations of the crown ether type ionic liquid are imidazole, benzimidazole and their derivatives; anions include neutral or alkaline mononuclear and multinuclear anions; the mononuclear anions include Cl-, Br-, BF4-, PF6-, CF3COO-, CF3SO2-, (CF3SO2)N- and OH-; the multinuclear anions include AlCl4-, FeCl3- CuCl3- and AuCl4-. In some reactions, the crown ether type ionic liquid has the advantages of high reaction rate, high conversion rate, high reaction selectivity, reusability of acatalytic system and the like. In addition, the crown ether type ionic liquid also has a potential application prospect in terms of solvent extraction, separation and purification of matters, recycling of waste macromolecular compounds, fuel cells and solar cells, extraction of industrial waste gas, dissolution of geological samples, separation and treatment of nuclear fuels and nuclear wastes andthe like.

Polyoxometalate-based Gemini ionic catalysts for selective oxidation of benzyl alcohol with hydrogen peroxide in water

Keggin-type phosphotungstic acid (H3PW12O40, HPW)-based di-imidazolium ionic liquid (IL) hybrids were prepared by exchanging the protons of HPW with PEG-bridged di-imidazolium cations in water. Characterization results sug

Design of task-specific ionic liquids for catalytic conversion of CO 2 with aziridines under mild conditions

A series of polyethylene glycol (PEG)-functionalized ionic liquids (ILs) were developed as recyclable and efficient catalysts for selective synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 without addition of any organic solvents or additives. In particular, high yields, chemo- and regio-selectivities of oxazolidinones were attained when BrDBNPEG 150DBNBr (DBN: 1,5-diazabicyclo[4.3.0]non-5-ene) was used as the catalyst, presumably due to activation of CO2 by the ether linkage in the PEG backbone, and stabilization of the ring-opened species of aziridine by the delocalized cation BrDBNPEG150DBN+. Furthermore, the catalyst could be reused for over four consecutive cycles without appreciable loss of catalytic activity and selectivity. The effects of catalyst structure and various reaction parameters on the catalytic performance were also investigated in detail. It was demonstrated that the catalyst worked well for a variety of aziridines producing the corresponding oxazolidinones in good yields and excellent regio-selectivities. Therefore, this solvent-free process could thus represent an environmentally friendly approach for ILs-catalyzed conversion of CO2 into value-added chemicals.

Lead(ii) tetrafluoroborate and hexafluorophosphate complexes with crown ethers, mixed O/S- and O/Se-donor macrocycles and unusual [BF4] - and [PF6]- coordination

The reaction of Pb[BF4]2 in H2O/MeCN solution with the macrocycle 18-crown-6 gave the dinuclear complex [{Pb(18-crown-6)(H2O)(μ2-BF4)} 2][BF4]2, containing two nine-coordinate lead centres, each bound to all six oxygens of a crown ligand, one water molecule and bridged by two μ2-BF4 groups. In contrast, the oxa-thia crown [18]aneO4S2 gave the mononuclear [Pb([18]aneO4S2)(H2O)2(BF 4)][BF4] in which the lead is coordinated O 4S2 within the puckered ring of the macrocycle, and with two water molecules on one side of the plane and a chelating (κ2) BF4- on the other. The [Pb([18]aneO4Se2)(BF4)2] has the two BF4- groups arranged mutually cis and with the macrocycle folded; within each BF4- group the Pb-F distances differ by ～0.5 A, producing a very unsymmetrical chelate. The 15-membered ring macrocycles 15-crown-5 and [15]aneO3S2 produce sandwich complexes [Pb(macrocycle)2][BF4]2 which contain 10-coordinate lead centres. Pb[PF6]2 in H2O/MeCN solution formed [Pb(18-crown-6)(H2O) 2(PF6)][PF6] and [Pb([18]aneO4S 2)(H2O)2(PF6)][PF6] which contain weak κ2-coordination of the PF6- group on the opposite side of the macrocyclic ring to two coordinated water molecules, giving 10-coordinate lead. In contrast, [Pb([18]aneO 4Se2)(PF6)2] has two κ2-coordinated PF6- groups disposed cis, with a very folded macrocycle conformation. In [Pb(18-crown-6)(NO 3)(PF6)] a chelating nitrate group occupies the coordination sites at Pb(ii) instead of the two water molecules, and the weakly coordinating PF6- group is tridentate. The crystal structures of the lead nitrate complexes, [Pb(15-crown-5)(NO3) 2] and [Pb([18]aneO4Se2)(NO3) 2], containing nine- and 10-coordinate lead respectively, are also reported. In solution the complexes are labile, and both conductivity and 19F NMR spectroscopic studies show the BF4- and PF6- groups are dissociated, whereas in the nitrate complexes the anion coordination is retained in solution. The identification of the coordination modes of the NO3- and BF4 - groups in the solid complexes by IR spectroscopy is discussed. The Royal Society of Chemistry 2013.

Synthesis and characterization of new vic-dioximes with benzo-15-crown-5 derivatives and their nickel(II), copper(II), cobalt(II) complexes

Benzo-15-crown-5-p-toluidino-glyoxime (1) and N(1-naphthyl)amino-benzo-15- crown-5-glyoxime (2) were synthesized by classical methods. Their structures were confirmed by spectral techniques. Both of them were capable of forming complexes with various metal ions (Co2+, Cu2+ and Ni 2+). The structure of the complexes was confirmed by FT-IR, mass spectra and elemental analyses.

Studies on the photochemical behavior of N-salicylidenaniline in chloroform

An N-salicylidenaniline (SA), compound 1 with 15-crown-5 moiety, was synthesized. The time-dependent NMR was used to track its photochromic process. The experimental results showed that ultraviolet irradiation would lead compound 1 to decompose into the corresponding salicylaldehyde and amine in chloroform solution, instead of experiencing a photochromic process. By the same method, the reported photochromic results of other SAs were also corrected.