A cost-effective and environmentally benign benzopyrano-pyrimidine derivative synthesis has been established with the condensation of different salicylaldehyde derivatives, piperidine/morpholine malononitrile, in presence a catalyst containing p-toluene sulphonic acid (PTSA) at 80 °C temperature. This procedure offers new enriched approach for synthesizing derivatives high yields, straightforwa...

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 dielectric behaviour of in-situ polymerized thin polypyrrole (PPy) films on synthetic textile substrates were obtained in the 1-18 GHz region using free space transmission and reflection methods. The PPy/para-toluene-2-sulphonic acid (pTSA) coated fabrics exhibited an absorption dominated total shielding effectiveness (SE) of up to -7.34 dB, which corresponds to more than 80 % of incident r...

Colloidal lignin nanoparticles (LNPs) from low temperature acid hydrotropic fractionation (AHF) of poplar wood and commercial alkali using p-Toluenesulfonic (p-TsOH) were directly mixed with PVA to make PVA/AHF-LNP nanocomposite films. p-TsOH itself acted as a plasticizer for PVA; however the application alone reduced film tensile strength therefore toughness. At proper loadings LNPs p-TsOH, bo...