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Diethyl amino phenol

Hung et al. (1982) developed a sensitive and selective method for silver analysis by reacting silver (I) with 2(3,5-dibromo-2-pyridylazo)-5-diethyl amino phenol in the presence of an anionic surfactant, sodium lauryl sulfate. The ternary complex formed is red and exhibits an absorption peak at 570 nm. Hung and his co-workers employed EDTA as a chelating agent, thereby reducing the interference of common ions. Recoveries were good, and a detection limit of 0.39 ppm of silver was achieved. [Pg.128]

Ionic liquid dispersive liquid-liquid microextraction. "2-[(5-bromo-2-pyridyl)-azo]-5-(diethyl-amino)phenol. [Pg.493]

Benzoxazaphosphol 2-Diethyl-amino-2,3-dihydro- El, 452 (CI2P-NR2 + 2-NH2 —phenol)... [Pg.785]

Trimethyl(trifluoromethyl)silane is easily fluorodesilylated by tris(dimethylamino)sulfonium difluorotrimethylsilicate [TASF(Me)], tetrabutylammonium fluoride, or tris(diethylamino) (methylamino)phosphonium hydrogen difluoride and. if arenesnlfonyl fluorides are used to trap the trifluoromethyl anion, trifluoromethyl sulfones are formed in high yield. Tris(diethyl-amino)(methylamino)phosphonium phenolate is also an effective catalyst for this reaction, but TASF(Me) is favored as it can achieve the quantitative transformation of ArS02F into aryl trifluoromethyl sulfones.115-117... [Pg.416]

Rhodamine B n. Pigment violet 10 (45170). Brilliant, strong dyestuff made by condensing diethyl-m-amino-phenol and phthalic anhydride together, in the presence of zinc chloride. [Pg.840]

Wang resin was purchased from Advanced ChemTech (1% DVB, 0.70mmol/g substitution, 100-200 mash, Cat. SA5009). Anhydrous tetrahydrofuran (THF), A/A-dimcthyl-formamide (DMF), methanol, dichloromethane, pyridine, 1,1 -carbonyldiimidazole (CDI), piperazine, homopiperazine, trans-1,4-diaminocyclohexane, 4-(dimethylamino)pyridine (DMAP), succinic anhydride, diglycolic anhydride, 3-methyl-glutaric anhydride, 2-aminophenol, 2-amino-p-cresol, 2-amino-4-tert-butyl phenol, /V-methylmorpholine (NMM), triphenylphosphine, diethyl azodicarboxylate (DEAD), and trifluoroacetic acid (TFA) were purchased from Aldrich Chemical Company, Inc. and used without further purification. PyBOP was purchased from Novabiochem. [Pg.80]

In preparation for the eventual removal of the undesired oxygen function at C-10 of 313 via a Birch reduction, the phenol 313 was phosphorylated with diethyl phosphorochloridate in the presence of triethylamine to give 314, which underwent stereoselective reduction with sodium borohydride with concomitant N-deacylation to deliver the amino alcohol 315. N-Methylation of 315 by the Eschweiler-Clarke protocol using formaldehyde and formic acid followed by ammonolysis of the ester group and acetylation of the C-2 hydroxyl function afforded 316. Dehydration of the amide moiety in 316 with phosphorus oxychloride and subsequent reaction of the resulting amino nitrile 317 with LiAlH4 furnished 318, which underwent reduction with sodium in liquid ammonia to provide unnatural (+)-galanthamine. [Pg.312]

The yields obtained on dominating the following amines further illustrate the wide utilitybf hypophosphorous acid 2,4-diethyl-6-bromoaniliae (70%),89 3-nitro-4-aminophenylarsonic acid (45%),90 3-amino-6-bromo-benzoic acid (75%),13 3,3 -dimethylbenzidine (76-82%),80-81 4-amino-7-chlorohydrindone-1 (85%),91 5-methyl-8-aminoquinoline (72%) 84 o-(/3-phenylethyl)-aniline (XXII) (47%).86 In the last case, when ethanol is used dibenzyl is not obtained instead the products are 9,10-dihydro-phenanthrene (co. 50%) and o-(j8-phenylethyl)-phenol (23%).66... [Pg.281]

The reaction between 2-hydroxy-5-nitro-benzyl chloride with diethylamine yields 2-hydroxy-5-nitro-N, N, diethyl benzyl amine, which on reduction gives 5-amino-2-diethylamino ethyl phenol. [Pg.619]

The Petasis reaction is a multicomponent condensation occurring between boronic acids, amines and aldehydes. The asymmetric version of this reaction is very attractive for the synthesis of chiral a-amino acids.In this context, Schaus and Lou reported the use of chiral biphenols as organocatalysts for the asymmetric Petasis reaction of ( )-diethyl styrylboronate with secondary amines and ethyl glyoxylate. The corresponding a-amino esters were obtained in high yields and enantioselectivities of up to 97% ee by using a vaulted biaryl phenol such as (5)-VAPOL as the organocatalyst in the presence of 3-A molecular sieves (Scheme 2.59). [Pg.114]

Exploratory research revealed the particular efficacy of vaulted biaryl phenol XXVIII as organocatalysts. Under optimized conditions, the secondary amines, ethyl glioxalate and diethyl boronate ester afforded a-amino acid esters 14-17 in high yield and with over 90% e.e. (Table 8.1) [33]. [Pg.111]

A new facile method for the rapid synthesis of aliphatic polyamides and polyimides was developed by using a domestic microwave oven to facilitate the polycondensation of both w-amino acids and nylon salts as well as of the salt monomers composed of aliphatic diamines and pyromellitic acid or its diethyl ester in the presence of a small amount of a polar organic medium. Suitable organic media for the polyamide synthesis were tetramethylene sulfone, amide-type solvents such as A -cyclohexyl-2-pyrrolidone (CHP) and 13-dimethyl-2-imidazolidone (DMI), and phenolic solvents like m-cresol and c)-chlorophenol, and for the polyimide synthesis amide-type solvents such as A-methyl-2-pyrrolidone, CHP, and DMI. In the case of the polyamide synthesis, the polycondensation was almost complete within 5 min, producing a series of polyamides with inherent viscosities around 0.5 dL/g, whereas the polyimides having the viscosity values above 0.5 dL/g were obtained quite rapidly by the microwave-assisted polycondensation for only 2 min. [Pg.421]

Additional apphcations make use of microsomes and liver homogenates. An example is the liver microsome-mediated in vitro transformation of 2,6-diethyl[U- " C]aniline into 4-amino-3,5-diethyl[U- " C]phenol, one of the predominant metabolites of the herbicide alachlor in rats". S9 liver homogenate was used to synthesize the main metabolite 25 of fasudil by hydroxylation of the labeled drug substance 24 (66% yield)". ... [Pg.619]


See other pages where Diethyl amino phenol is mentioned: [Pg.188]    [Pg.497]    [Pg.188]    [Pg.497]    [Pg.517]    [Pg.213]    [Pg.1032]    [Pg.238]    [Pg.344]    [Pg.89]    [Pg.138]    [Pg.206]    [Pg.341]    [Pg.284]    [Pg.1554]    [Pg.1077]    [Pg.270]    [Pg.201]    [Pg.184]    [Pg.217]    [Pg.242]    [Pg.91]    [Pg.1052]    [Pg.612]    [Pg.53]    [Pg.15]    [Pg.618]    [Pg.91]    [Pg.146]    [Pg.68]    [Pg.126]    [Pg.232]    [Pg.663]    [Pg.225]    [Pg.612]    [Pg.980]    [Pg.2602]   


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Amino-phenols

Diethyl amino

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