The reaction of dimethyl acetylenedicarboxylate with OH-acid such as 2-naphthol in the presence of trimethyl or triphenyl phosphite under solvent-free conditions produce oxaphosphaphenanthrene derivatives in good yields. Also, the reaction of dimethyl acetylenedicarboxylate and trimethyl phosphite in the presence of 1-naphthol leads to succinate derivatives in excellent yields. Using triethyl p...

The study was conducted to evaluate the status of worker exposure to polycyclic aromatic hydrocarbons (PAHs) through the measurement of urinary metabolites such as 1-hydroxypyrene (OHP) and 2-naphthol. A survey using a questionnaire involving 326 workers with measurement of urinary metabolites of 1-OHP and 2-naphthol was conducted. The differences in urinary 1-OHP and 2-naphthol concentrations,...

The polycyclic aromatic hydrocarbon naphthalene is an environmental pollutant, a component of jet fuel and, since 2000, has been reclassified as a potential human carcinogen. Few studies of the in vitro human metabolism of naphthalene are available and these focus primarily on lung metabolism. The current studies were performed to characterize naphthalene metabolism by human cytochromes P450 (C...

The effect of some unsubstituted aromatic amines and their oand p-hydroxylated derivatives on isolated rat-liver mito chondria has been studied. The o-hydroxylated amines inhibited oxygen uptake in the presence of nicotinamide adenine dinucleotide-dependent respiratory substrates. Of the other compounds only l-amino-4-naphthol inhibited oxygen uptake. The Buccinate oxidase system was inhibited ...

Naphthol is a widely used chemical and medical detection biomarker, but it harmful to human health the environment. Therefore, highly sensitive method for naphthol urgently required. Herein, an electrochemical microsensor simultaneous of isomers was fabricated by in situ growth three-dimensional graphene network (3DGN) on screen-printed electrodes. The exhibited good sensing responses typical (...

Urinary naphthol is an established human biomarker used for assessing both occupational and environmental exposure. However, 1-naphthol is a metabolite of the insecticide carbaryl while both the 1- and 2-isomers are metabolites of naphthalene. Thus, urinary 1-naphthol levels will reflect combined exposure to both substances, particularly at environmental levels. The interpretation of biomarkers...

To develop a new facile protocol for the synthesis of 2'-aminobenzothiazolo-arylmethyl-2-naphthol derivatives, N-bromosuccinimide (NBS) was used as an efficient catalyst for the one-pot synthesis of 2'-aminobenzothiazolo-arylmethyl-2-naphthols in excellent yields from β -naphthol (1 mmol), aromatic aldehydes (1 mmol), and 2-aminobenzothiazole (1 mmol) at 60°C under solvent-free conditions.