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  2. N-(1-Naphthyl)ethylenediamine - Wikipedia

    en.wikipedia.org/wiki/N-(1-Naphthyl)ethylenediamine

    Then an excess but fixed volume of sulfanilamide and N-(1-naphthyl)ethylenediamine dihydrochloride solution is added. With nitrous acid as the limiting reagent, the azo coupling reaction produces an azo dye quantitatively with respect to the nitrite ions: The diazo compound formed accounts for the red coloration typical for a positive result.

  3. 1-Naphthylamine - Wikipedia

    en.wikipedia.org/wiki/1-Naphthylamine

    The sulfonic acid derivatives of 1-naphthylamine are used for the preparation of azo dye.These compounds possess the important property of dyeing unmordanted cotton.. An important derivative is naphthionic acid (1-aminonaphthalene-4-sulfonic acid), which is produced by heating 1-naphthylamine and sulfuric acid to 170–180 °C in the presence of crystallized oxalic acid.

  4. 1-Naphthol - Wikipedia

    en.wikipedia.org/wiki/1-naphthol

    1-Naphthol biodegrades via formation of 1-naphthol-3,4-oxide, which converts to 1,4-naphthoquinone. [3] The 4-position of 1-naphthol is susceptible to electrophilic attack. This regioselective reaction is exploited in the preparation of diazo dyes, which are form using diazonium salts. Reduction of the diazo derivatives gives 4-amino-1-naphthol ...

  5. Aminonaphthalenesulfonic acids - Wikipedia

    en.wikipedia.org/wiki/Aminonaphthalenesulfonic_acids

    reduction of 1-nitroonaphthalene-8-sulfonic acid, precursor to C.I. Acid Blue 113 Notes: Peri-acid dehydrates to the sultam . Via the Bucherer reaction , heating periacid with anilinium salts gives the N-phenyl derivative, precursor to Acid Blue 113.

  6. Mannich reaction - Wikipedia

    en.wikipedia.org/wiki/Mannich_reaction

    In organic chemistry, the Mannich reaction is a three-component organic reaction that involves the amino alkylation of an acidic proton next to a carbonyl (C=O) functional group by formaldehyde (H−CHO) and a primary or secondary amine (−NH 2) or ammonia (NH 3). [1] The final product is a β-amino-carbonyl compound also known as a Mannich base.

  7. Mobility tax, other fees to prop up flailing MTA even after ...

    www.aol.com/news/mobility-tax-other-fees-prop...

    The payroll mobility tax applies to businesses in New York City, on Long Island and in some Hudson Valley suburbs. Currently, New York City businesses with payrolls larger than $437,500 must pay 0 ...

  8. The 5 Best Canned Soups for Better Blood Pressure ... - AOL

    www.aol.com/5-best-canned-soups-better-120000978...

    Just 1 cup of canned black bean soup provides 6 grams of protein, 8 grams of fiber and 309 milligrams of potassium. So, go ahead and dig in! Sweet Potato Soup.

  9. Bucherer reaction - Wikipedia

    en.wikipedia.org/wiki/Bucherer_reaction

    The organic reaction also goes by the name Bucherer-Lepetit reaction or (incorrectly) the Bucherer-Le Petit reaction. The reaction is used to convert 1,7-dihydroxynaphthalene into 7-amino-1-naphthol and 1-aminonaphthalene-4-sulfonic acid into 1-hydroxynaphthalene-4-sulfonic acid. It is also useful for transamination reactions of 2 ...