Naphthol Research Articles

Introduction to Substituted Naphthols

Introduction to Substituted Naphthols

The orientation in the ullmann‐fetvadjian acridine cyclizations with 2‐aminofluorene

Abstract2‐Aminofluorene is shown to undergo the Ullmann‐Fetvadjian acridine cyclization with α‐naphthol and paraformaldehyde at position 3, to give the linear indenoacridine; a similar reaction performed with β‐naphthol afforded a mixture of the corresponding linear and angular indenoacridines.

Studies on α-naphthol as a precursor of microbial menaquinone

Studies on α-naphthol as a precursor of microbial menaquinone

Micro Determination of Magnesium with Naphthol Black

Micro Determination of Magnesium with Naphthol Black

The structure of a chelate of copper(II) with 1-(2-pyridylazo)-2-naphthol

The structure of a chelate of copper(II) with 1-(2-pyridylazo)-2-naphthol

Ask any chemist about phthalic anhydride, and he'll give you all the facts. But ask him about para cresol, beta naphthol, or Tobias acid, and he's likely to reply: "Don't ask me. Ask Sherwin-Williams."

Ask any chemist about phthalic anhydride, and he'll give you all the facts. But ask him about para cresol, beta naphthol, or Tobias acid, and he's likely to reply: "Don't ask me. Ask Sherwin-Williams."

Carcinogenic nitrogen compounds. 53. Thiazole isosteres of dibenzacridines and dibenzocarbazoles.

Bz-Amino-derivatives of benzothiazole readily underwent Ullmann–Fetvadjian condensation with naphthols and paraformaldehyde, to give thiazole isosteres of carcinogenic dibenzacridines; with 4-hydroxycoumarin, coumarinothiazoloquinolines were obtained. Bz-Hydrazinobenzothiazoles were successfully used for the preparation of thiazole isosteres of carcinogenic dibenzocarbazoles.

SHistochemical studies on beta-glucuronidase in normal and abnormal tissues employing naphthol AS-OL glucuronide as a substrate.

SHistochemical studies on beta-glucuronidase in normal and abnormal tissues employing naphthol AS-OL glucuronide as a substrate.

Comparative detoxication. 11. Conjugations of 1-naphthol and some other phenols in houseflies and locusts.

Comparative detoxication. 11. Conjugations of 1-naphthol and some other phenols in houseflies and locusts.

342. The reaction between phenylhydrazine and 2-naphthol, studied with nitrogen-15

342. The reaction between phenylhydrazine and 2-naphthol, studied with nitrogen-15

A cytochemical and electron microscopic study of the thumb pad in Rana pipiens

The epidermis and the mucous gland of the thumb pad of male Rana pipiens were studied by histochemical and electron microscopic methods. During the breeding season the epidermis of the thumb thickens and becomes highly papillated while the mucous glands beneath increase enormously in size. The outer two-thirds of the epidermis reacts positively for alkaline phosphatase, acid phosphatase, alpha naphthol esterase, monoamine oxidase, succinic dehydrogenase and cytochrome oxidase. The mucous glands were found to consist of two different cell types. Most numerous are the typical secretory cells that give positive histochemical tests for alkaline phosphatase, acid phosphatase, alpha naphthol esterase but are unreactive for succinic dehydrogenase and cytochrome oxidase. Electron microscopic studies of these cells reveal typical secretory granules closely associated with the endoplasmic reticulum. The second cell type is nonsecretory that gives a strong positive reaction for succinic dehydrogenase and cytochrome oxidase and contains a rich complement of mitochondria.

The indicator of choice is Hydroxy Naphthol Blue AR

the indicator of choice is Hydroxy Naphthol Blue AR

ナフトールAS-KNの構造

ナフトールAS-KNの構造

The Isolation and Estimation of Beta-Naphthol in D&C Red 36

The Isolation and Estimation of Beta-Naphthol in D&C Red 36

Histochemical demonstration of erythrocyte esterases.

SummaryA high resolution technic is described for localization of intracellular sites of erythrocyte esterases. Blood smears are fixed in 1% osmium tetroxide in dimethylformamide at −15°C and then incubated in medium containing alpha naphthyl acetate and “hexaazotized” pararosanilin. Alpha naphthol released by enzymatic hydrolysis of the substrate ester couples with “hexaazonium”salt to form a colored, insoluble, amorphous deposit at sites of esterase activity.

Tritylation of Some Phenols and Naphthols

Tritylation of Some Phenols and Naphthols

(115)ナフトールベース用 m-トリフルオルメチルアニリン誘導体およびフッ素置換ナフトールASについて

(115)ナフトールベース用 m-トリフルオルメチルアニリン誘導体およびフッ素置換ナフトールASについて

(303)芳香族化合物のスルホン化に関する研究-β-ナフトールのモノスルホン化-

(303)芳香族化合物のスルホン化に関する研究-β-ナフトールのモノスルホン化-

O-Mercapto-azo-compounds. Part IV. Preparation and debenzylation of 1-(2-benzylthiophenylazo)-2-naphthol and 1-(1-benzylthio-2-naphthyl-azo)-2-naphthol

o-Mercapto-azo-compounds. Part IV. Preparation and debenzylation of 1-(2-benzylthiophenylazo)-2-naphthol and 1-(1-benzylthio-2-naphthyl-azo)-2-naphthol

Electrogalvanizing from Fluoborate Solutions

The optimum conditions for electroplating zinc from its fluoborate solution have been deduced by a systematic study of the effects of all types of variables on its plating characteristics. The best deposits of zinc are obtained from a bath containing 180 g/l of zinc fluoborate, 30 g/l of ammonium fluoborate, 25 g/l of boric acid, and 1.0 g/l of beta naphthol at a pH of 5.0 to 5.4 and temperatures of 20°–30°C, and at current densities of 4.3 to 9.7 amp/dm2 (40 to 90 amp/ft2). The deposits which are obtained on steel, brass, or copper are uniform, fine grained, adherent, and of pleasing appearance. The current efficiency of the process approximates 98 to 100 per cent cathodic and 102 to 105 per cent anodic. The bath is nonpoisonous, stable, and easily controlled. The new bath is comparable to the zinc cyanide bath, and is vastly superior to the zinc sulfate bath.