PhI(OAc)2-mediated iminobromination was developed starting from alkenyl carbonitriles and Grignard reagents. The present transformation is carried out by a sequence of nucleophilic addition of Grignard reagents to alkenyl carbonitriles to form N–H imines and their iminohalogenation by subsequen...
Porphyry deposits developed in intracontinental settings have some geological characteristics that differ from those developed in arc-related continental margins. The Chating deposit is a newly discovered Cu-Au deposit in the Middle-Lower Yangtze River Metallogenic Belt (MLYB), eastern China. We...
Shortwave infrared (SWIR, 1000–2500 nm) reflectance spectra of biotite and chlorite were investigated to establish quantitative relationships between spectral metrics and mineral chemistry, determined by electron microprobe analysis (EMPA). Samples spanning a broad range of mineral compositions...
A mica–organic hybrid solid lubricant was synthesized by an intercalation technique, where an alkyl ammonium cation was inserted into mica's interlayer region. And the lubrication performance and its mechanism were investigated. X-ray diffraction (XRD) showed that the distance between the ...
Canadian Malartic, with a total endowment of 16.3 Moz Au, is an important example of a large-tonnage, low-grade Archean gold deposit (current reserves of 204 Mt @ 1.08 g/t Au). It is located in the southern Superior Province in contact with, and immediately south of the east-west trending Cadill...
The Yuanzhuding porphyry Cu-Mo deposit, located in the southern section of the Qinzhou-Hangzhou belt, is characterized by successive generations of quartz-bearing veins with complicated crosscutting relationships. Multiple analytical methods have been applied to different mica types and quartz-b...
Dating of biotite using the 40Ar/39Ar method is used extensively to determine the timing of cooling and exhumation in metamorphic rocks. Interpretations of 40Ar/39Ar dates commonly assume that 40Ar diffuses out of biotite through temperature-dependent volume diffusion, and therefore that the dat...
The present communication describes a novel application of lime mud, a waste material generated in paper/pulp industries, for the recovery of potash values from mica scraps. Characterization studies of the mica scraps using X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) indicate ...
The extensive use of fluoroquinolones (FQs) antibiotics has resulted in their prevalence and subsequent antibiotic resistance, and then FQs have received increasing attention as one of the major contaminants in the environment. In present study, three minerals with different micro-structures inc...
Geita Hill is one of the largest Tanzanian gold deposits, located southwest of Lake Victoria and ∼ 2 km along strike from the giant Nyankanga deposit. The deposit is hosted by metasedimentary rocks - dominated by ironstones and intruded by numerous diorite dykes. Textural, structural and geochr...
The Li-Sn-W deposit Cínovec/Zinnwald in the eastern Erzgebirge (Czech Republic and Germany) represents one of the worldwide best known examples of complex rare-metal plutons with pervasive greisenization. Mica from altogether 38 samples representing all granite and greisen varieties from the pr...
Different compounds have been investigated as potent drugs for trypanosomiasis treatment, but no new drug has been marketed in the past 3 decades. 4-Thiazolidinone/thiazole as privileged structures and thiosemicarbazides cyclic analogs are well known scaffolds in novel antitrypanosomal agent des...
In the course of our program for discovery of novel DPP-IV inhibitors, a series of pyrazolo[1,5-a]pyrimidines were found to be novel DPP-IV inhibitors. We identified N-[2-({2-[(2S)-2-cyanopyrrolidin-1-yl]-2-oxoethyl}amino)-2-methylpropyl]-2-methylpyrazolo[1,5-a]pyrimidine-6-carboxamide hydrochlo...
A novel ribosylated imidazo[1,2-a]pyridine C-nucleoside was synthesized by condensing a lithiated 2,6-dichloroimidazo[1,2-a]pyridine (1) with a protected ribonolactone (2), followed by acetylation to give the intermediate nucleoside 4. This intermediate was reductively deacetoxylated and deprote...
1-(4′-Ethylphenoxy)-3,7-dimethyl-7-methoxy or ethoxy-trans-2-octene (the ethyl-methoxide and ethyl-ethoxide) are more stable in some biological systems and less stable in others than 1-(4′-ethylphenoxy)-3,7-dimethyl-6,7-epoxy-trans-2-octene (the ethyl-epoxide). In housefly adults and mealworm ...
Racemic 1-(1′-isoquinolinyl)-2-naphthalenemethanol rac-12 was prepared through a ligand coupling reaction of racemic 1-(tert-butylsulfinyl)isoquinoline rac-7 with the 1-naphthyl Grignard reagent 10. Resolution of rac-12 was achieved through chromatographic separation of the Noe-lactol derivativ...
The photophysical properties of the widely used plant growth regulator 2-(1-naphthyl) acetamide (NAD) were studied in water and representative organic solvents (ethanol, ethylene glycol, acetonitrile, chloroform, 1,4-dioxane) employing steady-state and time-resolved spectroscopy. Quantum yields ...
To access the enantiomers of 2-methyl-2-(2′-naphthyl)-1,3-benzodioxole-4-carboxylic acid (MNB carboxylic acid), lipase-catalyzed kinetic resolution of racemic [2-methyl-2-(2′-naphthyl)-1,3-benzodioxol-4-yl]methyl acetate was examined with Burkholderia cepacia lipase (Amano PS-IM) and Candida a...
New dialkylamino groups-comprising diarylethenes of 2,3-diarylcyclopent-2-en-1-one (DCP) series have been synthesized and its photochromic, fluorescent as well as acidochromic features have been investigated. It was shown that photochromic properties of the substances depend strong on their stru...
In this work we observed second harmonic nonlinear optical property in the grown 4-Dimethylaminopyridine copper chloride (4DMAPC) crystal. 4DMAPC appreciable size semiorganic non-linear optical crystal was grown by slow evaporation solution growth technique and the crystal was subjected to vario...
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