2,8-Bis 2- ethyl

Mediators acting as one-electron transfer agents toward NADH must possess relatively positive potentials [107]. This is the case for the iron complexes mentioned earlier with potentials between 800 and 930 mV vs. NHE. The compound 2,2 -azino-bis-(3-ethyl-benzothiazoline-6-sulfonic acid)-diammonium salt, ABTS (shown here), which is mainly used as a redox-dye indicator for the activity determination of certain enzymes, can act as one-electron redox catalyst for the NAD" regeneration at somewhat lower potentials of 430 mV vs. Ag/AgCl [108]. 

In 1999, Ube Industries Ltd. discovered that oxetane compounds, such as 3,3 -[oxybis(methylene)] bis(3-ethyl-oxetane) (149), can be used as additives in small quantities [144]. 

Many methods are available in which the hydrogen peroxide, usually in the presence of peroxidase, takes part in reactions to form colored products. Typical reagents are a combination of phenol with either p-hydroxybenzoic acid or 4-ami-noantipyrine, or 2,2 azino-bis-(3-ethyl-benzthiazo-line-6-sulfonate) (ABTS) alone. Interference can be a problem for example, ABTS is sensitive to the presence of proteins. Another drawback of colorimetric methods is that caHbration with glucose is obligatory. 

ABSOLUTES. Entirely alcohol-soluble extracts prepared by alcohol extraction of concretes or related fat-soluble or waxy materials, alcohol-insoluble substances being removed before evaporation of the solvent ABTS. 2,2 -Azino-bis-(3-ethyl-1,2-dihydro-benzothiazoline 6-sulfonate)... 

Compared to noble metal ORR catalysts, BOD and laccase show a few special features. They can use a second substrate, that is, the organic compound to be oxidized. The organic compound to be oxidized can be selected as a quasi-reversible redox couple, for example, 2,2 -azino-bis(3-ethyl-benzothiazoline-6-sulfonate) (ABTS ) that acts as a one electron donor for the laccase- or BOD-catalyzed reactions and is regenerated electrochemically [120] and thus can be used as mediator in biosensor applications or for SECM imaging ... 

Nickel bis[0-ethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate] [30947-30-9]... 

NjN -bis(l-ethyl-3-methylpentyl) [139-60-6] DEMPD hquid Flexzone 8L, UOP 88, Antozite 2... 

Bis-(iodomethyl)zinc-zinc iodide, 108 17 a,20 20,21-Bismethylenedioxy- U,2 -di-hydroxypregn-4-ene-3,11 -dione, 425 17a,20 20,21-Bismethylenedioxy-3,3-ethyl-enedioxy-5a,6a-oxidopregnan-l 1-one and 5 3,6p-oxide, 3... 

Cases of the S-coordinated rhodium and iridium are quite scarce. To complete the picture, we next consider the possibilities of S-coordination using complicated derivatives of thiophene. 2,5-[Bis(2-diphenylphosphino)ethyl]thiophene is known to contain three potential donor sites, two phosphorus atoms and the sulfur heteroatom, the latter being a rather nucleophilic center (93IC5652). A more typical situation is coordination via the phosphorus sites. It is also observed in the product of the reaction of 2,5-bis[3-(diphenylphosphino)propyl]thiophene (L) with the species obtained after treatment of [(cod)Rh(acac)] with perchloric acid (95IC365). Carbonylation of [Rh(cod)L][C104]) thus prepared yields 237. Decarbonylation of 237 gives a mixture of 238 and the S-coordinated species 239. Complete decarbonylation gives 240, where the heterocycle is -coordinated. The cycle of carbonylation decarbonylation is reversible. 

Triethylamine hydrochloride is separated by filtration and the filter cake is washed with 100 cc of anhydrous ethyl alcohol. The alcohol and the excess of triethylamine is distilled off in a vacuum of a water pump. The residue represents a light-yellowish brown viscous oil which is extracted 3 times with 500 cc of anhydrous benzene each time with stirring at 40° to 60°C. The benzene is distilled off on a water bath at 60°C. Thus, an oil is obtained which solidifies to a hard mass after some hours. This mass is crushed and dried over PjOs in an exsiccator. The compound represents N,N -bis-(3-hydroxypropyl)homo-piperazine. Yield 128.5 grams. FP 46°-47°C BPo.o2mm 141°-142°C. 

Nitroethane and formaldehyde are first reacted to give 2-methyl-2-nitro-1,3-propanediol. This is reacted with 2-ethylhexylamine and formaldehyde to give 5-nitro-1,3-bis(2-ethyl-hexyl)-5-methyl-hexahydropyrimidine. 

To a solution of 13 parts of compound A and 12 parts by volume of absolute pyridine in 80 parts by volume of absolute dioxane there are added dropwise and under constant stirring 35 parts of 3,4.5-trimethoxybenzoyl chloride dissolved in 70 parts by volume of absolute dioxane in the course of 30 minutes. The mixture is stirred for a further 3 hours at a temperature of 100°C and the excess solvent is then evaporated in vacuo. The residue of the evaporation is treated with ethyl acetate and saturated sodium carbonate solution, whereafter the organic phase is separated, treated with water, dried with sodium sulfate and the solvent is removed in vacuo. The residue thus obtained is taken up In ether and separated from 4 parts of insoluble trimethoxybenzoic acid anhydride by filtration. After evaporation of the ether there are obtained 32.5 parts of N,N -dimethyl-N,N -bis-[3-(3,4,5-trlmethoxybenzoxy)-propyl] -athylene diamine, corresponding to a yield of 86% of the theoretical. MP 75°C to 77°C. 

To a solution of 42.0 g of p-[N-bis(/3-chloroethyl)amino] phenyl butyric anhydride in 500 ml dry pyridine was added 24.4 g of prednisolone. The reaction mixture was kept at room temperature for 24 hours under anhydrous condition. It was then poured into a mixture of concentrated HCI and crushed ice and extracted with ether-ethyl acetate (1 1). 

Dihydroxy-1,4-bis- [dim ethyl-amino-meihyl]-benzol6 3-Hydroxy-2-dimethylamino-methyl-naphlhalin6... 

The binding of phenoxyl radical species to zinc has been observed. The pendent arm macro-cyclic ligand 1-ethyl-4,7-t-bis(3-butyl-5-methoxy-2-hydroxybenzyl)-l,4,7-triazacyclononane... 

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