The production of ethylen tially attractive, since the carbon source than petrol bonylation using methyl f used as the catalyst. Met were formed along with of formaldehyde source, r paraformaldehyde, 1,3,5-t The highest yields of met as the source of formalde and limited the rate of ca the highest yields of meth produce these products at methanesulfonic acid is a the reactive intermediates

We compared results for the liquid-chromatographic determination of free norepinephrine and epinephrine in urine after purifying the catechols by the following methods: (a) acid-washed alumina, (b) weak cation-exchange resin (WCX), (c) a combination of weak cation-exchange resin followed by alumina (WCX-alumina), and (d) commercially available phenylboronic acid adsorbent. We evaluated analytic...

Direct liquid-phase sulfonation of methane to methanesulfonic acid (MSA) with SO2 has been achieved in triflic acid using K2S2O8 as the oxidant and a small amount of a Ca salt as the promoter. The effects of reaction conditions on the conversion of SO2 to MSA were examined. Included were the influence of solvent acidity, reaction duration, reaction temperature, amount of K2S2O8, and composition...

The rearrangement reaction of thebaine (1) with methanesulfonic acid, in the presence of hydrogen sulfide, resulted in a sulfide-type bisaporphine 13, instead of the expected thiol 12. The acidic hydrolysis of the thiocyanato derivatives 3, 9, 20 and 21, obtained from thebaine (1), as well as the reduction of 9 and 21 with sodium borohydride yielded disulfide-type bisaporphines 16 and 23.

Anodic porous alumina has been widely investigated and used as a nanostructure template in various nanoapplications. The porous structure consists of numerous hexagonal cells perpendicular to the aluminum substrate and each cell has several tens or hundreds of nanoscale pores at its center. Because the nanomorphology of anodic porous alumina is limited by the electrolyte during anodizing, the d...

An expeditious, one-pot method for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones using a mixture of phosphorus pentoxide-methanesulfonic acid (Eaton's reagent) at room temperature under solvent-free conditions is described. The salient features of this method include short reaction time, green aspects, high yields, and simple procedure.

We developed a palladium-catalyzed carbonylative Sonogashira reaction with aryl triazenes and alkynes as substrates and methanesulfonic acid as the additive. A series of α,β-ynones were synthesized by this alternative procedure. Notably, bromides, iodides and hydroxyl groups could be well-tolerated under these reaction conditions.

This work is a proof-of-concept of the use azomethine-bearing diamines as novel hardeners standard epoxy compounds to yield cleavable and thermoformable covalent adaptable networks (CANs), with functional properties otherwise comparable conventional networks. A suitable aromatic diamine (TPA-o-PD) was synthesised at acceptable purity for intended successfully reacted DGEBA. The resulting cured ...