More than thirty years have already elapsed since we introduced diphenyl phosphorazidate (diphenylphosphoryl azide, DPPA, (PhO)2P(O)N3) as a reagent for organic synthesis in 1972 (Figure 1). During these years, DPPA has been found to be effective for a variety of organic reactions as a versatile synthetic reagent. It is not too much to say that DPPA has secured an established position as a reag...

a facile one step synthesis of anilino alky1-n-substituted phthalimide i is reported. the following compounds belonging to this series were made: 1. (anilino-n-ethyl) phthalimide 8 2. (3,4, 5-trimethoxy anilino-n-ethyl) phthalimide 6 3. (3,4, 5-trimethoxy anilino-n-propyl) phthalimide 7 4. n-(ethyl phthalirnido-p-amino benzoyl) glutamic acid diethyl ester 10 5. n-(propyl phthalimido-p-amino ben...

The effect of MnZ÷/Mn 2÷, Mn2÷/Zn 2÷ and ~VIn2+]Cd 2÷ reconstituted phosphotriesterase on the 3~p spin lattice (1/Tx) relaxation rate of diethyl p-methoxyphenyl phosphate has been investigated. In the presence of MnZ÷/Mn 2+ phosphotriesterase, the spin lattice relaxation rate of the phosphorus atom is enhanced giving an upper limit for the phosphorus-metal root mean-sixth average distance of 4....

background: the present study was undertaken to study the larvicidal activity of different extracts of nerium ole- ander leaves, and post-treatment temperature- toxicity relationship of these extracts against culex pipiens. further, the most potent extract was used to evaluate its biological and genotoxic activities. methods: crude extracts of n. oleander leaves were prepared using water, chlor...

The poor operational stability of electrolytes is a persistent impediment in building redox flow battery technology; choosing suitable additives usually the research direction to solve this problem. effects five phosphate containing (including 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), hexamethylene diamine tetramethylene phosphonic (HDTMPA), amino trimethylene (ATMPA), sodium ethylenedi...

Sponges, which constitute the phylum Porifera, are the most primitive of the multicellular animals, among all marine organisms screened. Marine sponges produce the largest number of structurally diversified natural products. In this study we investigated in vitro antimicrobial activity of Ircinia mutans collected from the Kish Island in the Persian Gulf against strains of bacteria Escherichia c...

A study was undertaken in order to understand the kinetics and mechanism of the chemical oxidation of N,N-diethyl-m-toluamide, an insect repellent, by sulfate radical. In this experiment, sulfate radical was generated using peroxymonosulfate with iron(II) and cobalt(II) as activator. The second-order rate constant for the reaction of the sulfate radical with N,N-diethyl-m-toluamide was found to...

background: this study aimed at determining the appropriate method for dewatering and drying biomass and selecting a suitable organic solvent for lipid extraction. methods: nannochloropsis oculata was cultured in gillard f/2 medium and after reaching the end of the stationary growth phase, algal biomass was separated from aqueous by centrifuge and dried through three methods: oven, air-dried an...

The inhibition of proteolytic enzymes by organophosphorus compounds has been extensively studied in recent years (1, 2). Such studies have shown that the reaction of trypsin with diisopropyl fluorophosphate (3) or diethyl p-nitrophenyl phosphate (DENP) (4) is accompanied by a loss in the proteolytic, esterase, and amidase activities of this enzyme. It is not certain, however, whether these inhi...