hydrogenation reaction with n-heptane on pt/al2o3 catalyst was investigated under the steady state condition in a fixed bed reactor. the catalyst was prepared under a variety of conditions, but the one chosen was non-acidic that is not considered a hydrocracking catalyst. the main objective was to vary the selectivity of n-heptane as a function of reaction variables especially the partial press...

With the aim of discovering new anticancer agents, we have designed and synthesized novel α-aminophosphonate derivatives containing a 2-oxoquinoline structure using a convenient one-pot three-component method. The newly synthesized compounds were evaluated for antitumor activities against the A549 (human lung adenocarcinoma cell), HeLa (human cervical carcinoma cell), MCF-7 (human breast cancer...

The adsorption of the chemical warfare agent simulant dimethyl methylphosphonate (DMMP) and the real agents Sarin and VX on the γ-Al2O3 surface has been studied using density functional theory. The focus is primarily on two different environmental effects, namely, surface hydroxylation and photoexcitation due to terrestrial solar radiation. Cluster models for the hydroxylated surface have been ...

Solvent extraction is the most widely used method for separation and purification of rare earth elements, organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) di(1-methyl-heptyl) methyl phosphonate (P350) are commonly industrial applications. However, presence impurity ions in feed liquid during can easily emulsify extractant affect quality products. Aluminum ion common liquid, i...

Streptomyces regensis strain WC-3744 was identified as a potential phosphonic acid producer in a large-scale screen of microorganisms for the presence of the pepM gene, which encodes the key phosphonate biosynthetic enzyme phosphoenolpyruvate phosphonomutase. (31)P NMR revealed the presence of several unidentified phosphonates in spent medium after growth of S. regensis. These compounds were pu...

The thermal reaction of trans-1-methyl-2,3-diphenylaziridine (trans-1a) with aromatic and cycloaliphatic thioketones 2 in boiling toluene yielded the corresponding cis-2,4-diphenyl-1,3-thiazolidines cis4 via conrotatory ring opening of trans-1a and a concerted [2þ 3]-cycloaddition of the intermediate (E,E)-configured azomethine ylide 3a (Scheme 1). The analogous reaction of cis-1a with dimethyl...