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  • acid
  • Traditionally, 2-naphthol is produced by a two-step process that begins with the sulfonation of naphthalene in sulfuric acid: C10H8 + H2SO4 → C10H7SO3H + H2O The sulfonic acid group is then cleaved in molten sodium hydroxide: C10H7(SO3H) + 3 NaOH → C10H7ONa + Na2SO3 + 2 H2O Neutralization of the product with acid gives 2-naphthol. (wikipedia.org)
  • It is produced synthetically by converting p-aminobenzamide into the corresponding diazonium compound followed by diazotation with 3-hydroxy-2-naphththoic acid (2-ethoxy)anilide ("Naphtol AS-PH" dye precursor). (wikipedia.org)
  • synthesis
  • However, there are no examples of the use of NBS as a catalyst for the synthesis of 2′-aminobenzothiazolo-arylmethyl-2-naphthols. (hindawi.com)
  • In continuation of our efforts to explore newer reactions for the synthesis of heterocyclic compounds, we wish to report here a facile and improved protocol for preparation of 2′-aminobenzothiazolo-arylmethyl-2-naphthols from β -naphthol, aromatic aldehydes, and 2-aminobenzothiazole in the presence of NBS as a catalyst under solvent-free conditions (Scheme 1 ). (hindawi.com)
  • One example is the synthesis of the dye "organol brown" from aniline and 1-naphthol: Similarly β-naphthol couples with phenyldiazonium electrophile to produce an intense orange-red dye. (wikipedia.org)
  • solution
  • The Voges-Proskauer test uses 1-naphthol in potassium hydroxide (KOH) solution to detect the breakdown of glucose into acetoin which is used by bacteria for external energy storage. (wikipedia.org)
  • solid
  • cis -Decahydro-1-naphthol (DHN) was used in the solid-phase microextraction (SPME) and membrane-assisted solvent extraction (MASE) method for the detection of 2-methylisoborneol and geosmin in aqueous samples. (sigmaaldrich.com)