Herein we present a mild, simple and environmentally friendly diazotization protocol of aromatic heteroaromatic anilines into stable diazonium salts that surpass previously reported procedures. The reaction proceeds with tert -butyl nitrite in the presence an equimolar amount or small excesses p -toluenesulfonic acid ethyl acetate, at room temperature. o -Phenylenediamines yield benzotriazolium...

The title compound, C(18)H(12)N(6)O(6), was prepared from the reaction of 4-(phenyl-diazen-yl)aniline (aniline yellow) with picryl-sulfonic acid. The dihedral angle formed by the two benzene rings of the diphenyl-diazenyl ring system is 6.55 (13)° and that formed by the rings of the picrate-aniline ring system is 48.76 (12)°. The mol-ecule contains an intra-molecular aniline-nitro N-H⋯O hydroge...

The oxidation of aniline to azobenzene was conducted in the presence of either monolayer graphene (EG) or graphene-oxide-like surface, such as GOx, under ultra-high vacuum conditions maintaining a 365-nm UV light exposure to enhance the oxidation reaction. The surface-bound products were investigated using micro Raman spectroscopy, high-resolution photoemission spectroscopy, and work function m...

Increasing numbers of workers in industry are working a novel or unusual 12-hr workshift in which the exposure time is longer and the recovery period is shorter than for a standard 8-hr workshift. Experiments were conducted to examine the effects of altering the exposure schedule of rats from 8 hr/day for 5 days to 12 hr/day for 4 days on the toxicity resulting from the inhalation of aniline at...

Streptococcal proteinase was shown to belong to a group of enzymes such as trypsin, chymotrypsin, and subtilisin that exhibit a high ratio of esterase to peptidase activity. In this respect, streptococcal proteinase is different from other sulfhydryl enzymes, such as papain and ficin, and also different from pepsin. These enzymes hydrolyze a specific ester and amide substrate at comparable rate...

N-(substituted-benzoyl)-1-aminonaphthalenes and N-(substituted-benzoyl)-2-aminonaphthalenes (1-NBAs and 2-NBAs) with varied substituents at the para- or meta-position of benzoyl phenyl ring were prepared to probe the difference between 1-aminonaphthalene (1-AN) and 2-aminonaphthalene (2-AN) as electron donors, using benzanilide-like charge transfer as a probe reaction. An abnormal long-waveleng...

The synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .Theprepared compounds were characterized by UV-Visible , FT-IR and H NMR spectroscopictechniques . The effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...