72583-76-7

Upstream product

• 73776-01-9 1,10-bis-(2-nitrophenyl)-1,4,7,10-tetraoxadecane 
• 112-26-5 1,2-bis(2-chloroethoxy)ethane 
• 824-39-5 sodium o-nitrophenate 
• 88-75-5 2-hydroxynitrobenzene 
• 31255-10-4 1,2-bis-(2-bromo-ethoxy)-ethane 
• 19249-03-7 triethylene glycol di-(p-toluenesulfonate) 
• 95-55-6 2-amino-phenol 
• 112-27-6 2,2'-[1,2-ethanediylbis(oxy)]bisethanol 

Downstream Products

• 126292-70-4 15,16,18,19,21,22-hexahydro-7-phenyl-5H-dibenzo<1,11,14,17,4,5,7,8>tetraoxatetraazacyclononadecyne 
• 1329608-98-1 C₃₂H₃₀Cl₂N₂O₆ 
• 1401622-91-0 C₂₄H₂₂N₈O₄ 
• 1401622-95-4 C₂₄H₂₄N₁₄O₄ 
• 773896-20-1 1,8-bis(o-chloroacetamidophenoxy)-3,6-dioxaoctane 
• 876396-26-8 C₄₂H₄₈N₂O₁₀ 
• 113366-78-2 3-Phenyl-11,14,17,20-tetraoxa-2,4-diaza-3-phospha-tricyclo[19.4.0.0^5,10]pentacosa-1⁽²⁵⁾,5,7,9,21,23-hexaene 3-sulfide 
• 344768-22-5 C₃₂H₃₆N₂O₈S₂ 

Relevant academic research and scientific papers

Synthesis and spectroscopic properties of new bis-tetrazoles

Syntheses of N,N′-phenyltetrazole podands link with aliphatic chains containing oxygen, nitrogen and sulphur atoms, are described. The complexing properties of these compounds towards metal cations (Fe2+, Cu 2+, Zn2+, Co2+, Ni2+) were investigated by absorption and infrared spectroscopy. The UV-Vis titrations were performed to estimate the stability constant values of the respective complexes with Cu2+ ion. Changes in UV-Vis absorption spectra and IR spectra of compound 6 under various concentrations of Cu2+ ion in methanol suggest formation of very unstable complex. The structure of ligand 2 has been deduced by X-ray crystallography. The Author(s) 2012.

Synthesis, characterization, tautomerism and theoretical study of some new Schiff base derivatives

New Schiff base derivatives were prepared by the condensation of 5-chloro and 5-bromo salicylaldehyde with bis(o-aminophenol)ethers. Five bis(o-nitrophenol)ether compounds were synthesized using some ditosylate, 1,3-dibromopropane and 1,4-dibromobuthane w

Application of chemometrics and quantum chemical calculations to the study of complexation equilibria between 1,8-bis(o-aminophenoxy)-3,6-dioxaoctane and some transition and heavy metal ions in acetonitrile solution

Evolutionary factor analysis (EFA) and rank annihilation factor analysis (RAFA) were applied to resolve the two-way equilibrium spectrophotometric data for the determination of stability constants of the complexes of 1,8-bis(o-aminophenoxy)-3,6-dioxaoctan

Chromogenic macrocyclic derivatives of azoles - Synthesis and properties

The synthesis of macrocyclic chromogenic derivatives of pyrrole and imidazole is described. The complexing properties of these compounds with metal cations were investigated spectrophotometrically in acetonitrile. The synthesized crown ethers were also te

The halogen-mediated opening of epoxides in the presence of pyridine-containing macrocycles

The ring opening of epoxides with elemental iodine and bromine in the presence of three pyridine-containing macrocyclic diamides as new catalysts affords vicinal iodo alcohols and bromo alcohols in high yields. This new procedure occurs regioselectively under mild conditions in various aprotic solvents. The catalysts are easily recovered and can be reused several times.

Phenol-containing macrocyclic diamides as new catalysts in the highly regioselective conversion of epoxides to β-hydroxy thiocyanates

The regioselective ring-opening reactions of some epoxides with ammonium thiocyanate in the presence of a series of new phenol-containing macrocyclic diamides and also dibenzo-18-crown-6-, 18-crown-6-, benzo-15-crown-5-, and pyridine-containing macrocyclic diamide have been studied. The epoxides were subject to cleavage by NH4SCN in the presence of these catalysts under mild reaction conditions in various aprotic solvents. In this study, reagents and conditions have been discovered with which the individual β-hydroxy thiocyanates can be synthesized in high yield and with more than 90% regioselectivity. The results can be discussed in terms of a four-step mechanism: (1) formation of complex between catalyst and NH4SCN, (2) release of SCN- nucleophile from the complex, (3) reaction of the active nucleophile at the less sterically hindered site in the epoxide, and (4) regeneration of catalyst. The major advantages of this method are as follows: (1) high regioselectivity, (2) simple regeneration of catalyst, (3) its reuse through several cycles without a decrease in activity, and (4) ease of workup of the reaction.

A simple preparation of O-substituted o-aminophenols

A simple and not protective method, phase transfer catalysis (PTC) in solvent-free conditions, to prepare the title compounds is described.

Preparation and Characterization of New Amino-Substituted Crowns and Podands

A number of macrocyclic (1b-3b) and linear oligoether compounds (4b-8b) with 2,2'-methylenebis(4-aminophenol) or 2-aminophenol characteristic building blocks have been synthesized by reduction of the corresponding nitro derivatives with Pd-C/hydrazine hydrate.The pKa' values of the new compounds have been determined by potentiometric titration.These and the observed spectroscopic data are discussed and compared with related compounds.A crystalline 1:1 complex of the diamino crown 3b with NaSCN has also been prepared and characterized. Keywords: Amino Crowns, Amino Podands, Synthesis, Spectroscopic Studies

Novel Ditopic Receptors Based on the P2N2 Diphosphazane Ring: Synthesis and X-ray Structural Characterization of Cis and Trans Bis(crown ether) Annellated 1,3,2λ54λ5-Diazadiphosphetidine 2,4-Disulfide

The 1,3,2,4-diazadiphosphetidine ring is used for the construction of the bis(crown ether) derivative 1, which occurs as cis and trans isomers.Refluxing triethylene glycol dianilino ether 3 with hexamethylphosphorous triamide (HMPT) in toluene followed by addition of sulfur gave 1 as a crystalline material in isolated yields ranging from 25percent to 73percent.The compounds have been characterized by a combination of 1H, 13C, and 31P NMR and mass spectral data.The structural assignments of the two diastereoisomers are based on X-ray structural analysis.Crystal data at 291 K are as follows: cis-1*H2O a=11.030(9) Angstroem, b=11.169(3) Angstroem, c=18.101(13) Angstroem, α=85.68(4) deg, β=87.06(6) deg, γ=86.57(4) deg, Z=2, triclinic, space group , R=0.087 for 5888 reflections with I>/=2.5?(I); trans-1*2CH2Cl2 a=11.757(3) Angstroem, b=11.140(4) Angstroem, c=9.393(1) Angstroem, α=65.51(2) deg, β=101.12(2) deg, γ=100.63(3) deg, Z=1, triclinic, space group , R=0.054 for 3531 reflections with I>/=2.5?(I).In the cis isomer, a water molecule is encapsulated in the cavity formed by the two macrocyclic moieties facing each other.The trans isomer, which crystallizes with two dichloromethane molecules, lies on a crystallographic center of symmetry.The macrocyclic intermediate precursor 4 is characterized together with the bis(crown) derivative 5.The tervalent parent compounds are extremely sensitive to moisture.The macrocycle 8 containing a P(O)H fragment is a degradation product.

Macroheterocycles with an Endocyclic Azo-Group. 1. Tetraazamacrocycles Obtained from Resorcinol

High-dilution azocoupling of bisdiazotized bis-(2-aminophenyl)oligooxa (or thia)alkanes with resorcinol gives tetraazamacrocycles with two endocyclic azogroups.It is shown that azocoupling occurs exclusively at the 2- and 4-positions of the resorcinol ring.