Results 241 to 250 of about 24,479 (307)
Some of the next articles are maybe not open access.
Journal of Hazardous Materials
P-phenylenediamines (PPDs) and a quinone derivative (6PPD-Q), as antioxidants added to tires, can inevitably enter into the environment during tire wear emission, posing potential health and ecological risks.
Nan Jiang +9 more
semanticscholar +1 more source
P-phenylenediamines (PPDs) and a quinone derivative (6PPD-Q), as antioxidants added to tires, can inevitably enter into the environment during tire wear emission, posing potential health and ecological risks.
Nan Jiang +9 more
semanticscholar +1 more source
Green Chemistry, 2019
A general methodology to access valuable 3-arylquinoxalin-2(1H)-ones was developed, by the reaction of α-keto acids with ortho-phenylenediamines in the presence of ammonium niobium oxalate (ANO) as a catalyst.
Camila P. Ebersol +6 more
semanticscholar +1 more source
A general methodology to access valuable 3-arylquinoxalin-2(1H)-ones was developed, by the reaction of α-keto acids with ortho-phenylenediamines in the presence of ammonium niobium oxalate (ANO) as a catalyst.
Camila P. Ebersol +6 more
semanticscholar +1 more source
p-Phenylenediamine sensitization and occupation
Contact Dermatitis, 2010p-Phenylenediamine (PPD) is an extreme delayed-type skin sensitizer, and is relevant in both occupational and non-occupational exposures.To estimate the prevalence of PPD sensitization in a population of consecutive patients with suspected allergic contact dermatitis who attended units of dermatology or occupational medicine in north-eastern Italy and ...
MALVESTIO, ANDREA +6 more
openaire +3 more sources
Organic Letters
We disclose the synthesis of 3-arylquinoxalin-2-ones from o-phenylenediamines and readily available arylacetates. The method harnesses the selective oxidative property of elemental sulfur in the presence of amine base catalyst and DMSO. The reactions are
L. A. Nguyen +5 more
semanticscholar +1 more source
We disclose the synthesis of 3-arylquinoxalin-2-ones from o-phenylenediamines and readily available arylacetates. The method harnesses the selective oxidative property of elemental sulfur in the presence of amine base catalyst and DMSO. The reactions are
L. A. Nguyen +5 more
semanticscholar +1 more source
Organic Letters
Phenazines, crucial constituents of nitrogen-containing heterocycles, widely exist in functional compounds. Herein, we report an anodic oxidative (4 + 2) cyclization between anilines and o-phenylenediamines for the uniform construction of phenazines in a
Peng-Fei Huang +4 more
semanticscholar +1 more source
Phenazines, crucial constituents of nitrogen-containing heterocycles, widely exist in functional compounds. Herein, we report an anodic oxidative (4 + 2) cyclization between anilines and o-phenylenediamines for the uniform construction of phenazines in a
Peng-Fei Huang +4 more
semanticscholar +1 more source
Industrial & Engineering Chemistry Research, 2019
The present work reports for the first time ultrasound-assisted polymerization of Alizarin Red (AR), Amido Black 10B (AB-10B), 1,4-Benzoquinone (BQ) with ortho and para-phenylenediamines.
Neetika Singh +3 more
semanticscholar +1 more source
The present work reports for the first time ultrasound-assisted polymerization of Alizarin Red (AR), Amido Black 10B (AB-10B), 1,4-Benzoquinone (BQ) with ortho and para-phenylenediamines.
Neetika Singh +3 more
semanticscholar +1 more source
Tetrahedron, 2018
A facile, general, and economical synthesis of diversely functionalized benzimidazoles and 2-substituted benzimidazoles has been realized via the imidazolium chloride-catalyzed cyclization of o-phenylenediamines with DMF derivatives.
Zong-Jie Gan +8 more
semanticscholar +1 more source
A facile, general, and economical synthesis of diversely functionalized benzimidazoles and 2-substituted benzimidazoles has been realized via the imidazolium chloride-catalyzed cyclization of o-phenylenediamines with DMF derivatives.
Zong-Jie Gan +8 more
semanticscholar +1 more source
In vitro cytotoxicity of methylated phenylenediamines
Toxicology Letters, 1992The acute cytotoxicities of methylated phenylenediamines (PDs) were evaluated with the neutral red assay, using BALB/c 3T3 mouse fibroblasts as the bioindicators. When the test agents were grouped according to their degree of methylation, good correlations were noted between their in vitro cytotoxicity and their in vivo myotoxicity to experimental ...
H, Babich, A, Stern, R, Munday
openaire +2 more sources
, 2019
A [4+3] annulation of o-phenylenediamines with primary nitroallylic acetates affords nitrobenzodiazepines (NBDZs) in good to excellent yield. The reaction which proceeds in MeOH at room temperature in the absence of any base or catalyst involves a ...
Divya K. Nair +3 more
semanticscholar +1 more source
A [4+3] annulation of o-phenylenediamines with primary nitroallylic acetates affords nitrobenzodiazepines (NBDZs) in good to excellent yield. The reaction which proceeds in MeOH at room temperature in the absence of any base or catalyst involves a ...
Divya K. Nair +3 more
semanticscholar +1 more source
Aniline-phenylenediamine copolymers
Synthetic Metals, 1999The electrical conductivity of materials based on polyaniline can be controlled on submolecular level by the copolymerization of aniline with various phenylenediamines. The joint chemical oxidation of aniline with phenylenediamines yields products with the dc conductivity spanning over more than eleven orders of magnitude.
J. Prokeš +3 more
openaire +1 more source