Synthesis, characterization and antimicrobial activity of bifunctional sulfonamide-amide derivatives

A convenient synthesis of bifunctional sulfonamide-amide derivatives was reported. Amide coupling of 4-methyl benzoic acid 1 followed by reaction with chlorosulfonic acid produce ethyl-4-(3-(chlorosulfonyl)-4-methylbenzoyl)piperazine- 1-carboxylate 4. The resulted compound on further treatment with various anilines produces the title sulfonamide-amide derivatives 5a−n. The configurations of these compounds were established by elemental analysis, IR, 1H NMR, mass spectra, and by their preparation from the corresponding 4-methyl benzoic acid 1 and chlorosulfonic acid. All these new compounds demonstrate significant in vitro antibacterial and antifungal activities against all bacterial and fungal strains.Korean Chemical Societyhttp://journal.kcsnet.or.kr/am201

Hydrogels and its Nanocomposites from Renewable Resources: Biotechnological and Biomedical Applications

Eco-friendly hydrogel and its nanocomposite (NC) hydrogels prepared from renewable resources have drawn significant attention from industrial and academic sectors. The ecofriendly polymeric hydrogels contain polymers or their composites, which are either biodegradable or biobased (from renewable resources). Their carbon-neutral lifecycle may reduce the emission of carbon dioxide and the dependence on petroleum-based materials and then reduce the human footprint on the environment. In this concern, the technologies are required in order to develop novel soft materials beside to get the new information, and fundamental understanding results in important advancement in the field of hydrogels and its NC hydrogels. A wide diversity of complex hydrogel structures have been found with distinct physical, chemical, and biological properties at the nanometer level. The possibility in order to develop self-assembled and supramolecular morphologies makes natural polymers and inorganic nanoparticles desirable building blocks for the design of water-based gels. In this book chapter, we partially covered the accomplishments and trends in the field of NC polymer hydrogels with a focus on creative approaches to generating structures, properties, and function within mostly biotechnological and biomedical application

Cloning and functional characterization of a fructan 1-exohydrolase (1-FEH) in edible burdock (Arctium lappa L.)

<p>Abstract</p> <p>Background</p> <p>We have previously reported on the variation of total fructooligosaccharides (FOS), total inulooligosaccharides (IOS) and inulin in the roots of burdock stored at different temperatures. During storage at 0°C, an increase of FOS as a result of the hydrolysis of inulin was observed. Moreover, we suggested that an increase of IOS would likely be due to the synthesis of the IOS by fructosyltransfer from 1-kestose to accumulated fructose and elongated fructose oligomers which can act as acceptors for fructan:fructan 1-fructosyltransferase (1-FFT). However, enzymes such as inulinase or fructan 1-exohydorolase (1-FEH) involved in inulin degradation in burdock roots are still not known. Here, we report the isolation and functional analysis of a gene encoding burdock 1-FEH.</p> <p>Results</p> <p>A cDNA, named <it>aleh1</it>, was obtained by the RACE method following PCR with degenerate primers designed based on amino-acid sequences of FEHs from other plants. The <it>aleh1 </it>encoded a polypeptide of 581 amino acids. The relative molecular mass and isoelectric point (<it>pI</it>) of the deduced polypeptide were calculated to be 65,666 and 4.86. A recombinant protein of <it>aleh1 </it>was produced in <it>Pichia pastoris</it>, and was purified by ion exchange chromatography with DEAE-Sepharose CL-6B, hydrophobic chromatography with Toyopearl HW55S and gel filtration chromatography with Toyopearl HW55S. Purified recombinant protein showed hydrolyzing activity against β-2, 1 type fructans such as 1-kestose, nystose, fructosylnystose and inulin. On the other hand, sucrose, neokestose, 6-kestose and high DP levan were poor substrates.</p> <p>The purified recombinant protein released fructose from sugars extracted from burdock roots. These results indicated that <it>aleh1 </it>encoded 1-FEH.</p

CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey

The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is designed to document the first third of galactic evolution, over the approximate redshift (z) range 8--1.5. It will image >250,000 distant galaxies using three separate cameras on the Hubble Space Telescope, from the mid-ultraviolet to the near-infrared, and will find and measure Type Ia supernovae at z>1.5 to test their accuracy as standardizable candles for cosmology. Five premier multi-wavelength sky regions are selected, each with extensive ancillary data. The use of five widely separated fields mitigates cosmic variance and yields statistically robust and complete samples of galaxies down to a stellar mass of 10^9 M_\odot to z \approx 2, reaching the knee of the ultraviolet luminosity function (UVLF) of galaxies to z \approx 8. The survey covers approximately 800 arcmin^2 and is divided into two parts. The CANDELS/Deep survey (5\sigma\ point-source limit H=27.7 mag) covers \sim 125 arcmin^2 within GOODS-N and GOODS-S. The CANDELS/Wide survey includes GOODS and three additional fields (EGS, COSMOS, and UDS) and covers the full area to a 5\sigma\ point-source limit of H \gtrsim 27.0 mag. Together with the Hubble Ultra Deep Fields, the strategy creates a three-tiered "wedding cake" approach that has proven efficient for extragalactic surveys. Data from the survey are nonproprietary and are useful for a wide variety of science investigations. In this paper, we describe the basic motivations for the survey, the CANDELS team science goals and the resulting observational requirements, the field selection and geometry, and the observing design. The Hubble data processing and products are described in a companion paper.Comment: Submitted to Astrophysical Journal Supplement Series; Revised version, subsequent to referee repor

CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics

This paper describes the Hubble Space Telescope imaging data products and data reduction procedures for the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS). This survey is designed to document the evolution of galaxies and black holes at $z\sim1.5-8$, and to study Type Ia SNe beyond $z>1.5$. Five premier multi-wavelength sky regions are selected, each with extensive multiwavelength observations. The primary CANDELS data consist of imaging obtained in the Wide Field Camera 3 / infrared channel (WFC3/IR) and UVIS channel, along with the Advanced Camera for Surveys (ACS). The CANDELS/Deep survey covers \sim125 square arcminutes within GOODS-N and GOODS-S, while the remainder consists of the CANDELS/Wide survey, achieving a total of \sim800 square arcminutes across GOODS and three additional fields (EGS, COSMOS, and UDS). We summarize the observational aspects of the survey as motivated by the scientific goals and present a detailed description of the data reduction procedures and products from the survey. Our data reduction methods utilize the most up to date calibration files and image combination procedures. We have paid special attention to correcting a range of instrumental effects, including CTE degradation for ACS, removal of electronic bias-striping present in ACS data after SM4, and persistence effects and other artifacts in WFC3/IR. For each field, we release mosaics for individual epochs and eventual mosaics containing data from all epochs combined, to facilitate photometric variability studies and the deepest possible photometry. A more detailed overview of the science goals and observational design of the survey are presented in a companion paper.Comment: 39 pages, 25 figure

Synthesis, Characterization and Antimicrobial Activity of Bifunctional Sulfonamide-Amide Derivatives

A convenient synthesis of bifunctional sulfonamide-amide derivatives was reported. Amide coupling of 4-methyl benzoic acid 1 followed by reaction with chlorosulfonic acid produce ethyl-4-(3-(chlorosulfonyl)-4-methylbenzoyl)piperazine- 1-carboxylate 4. The resulted compound on further treatment with various anilines produces the title sulfonamide-amide derivatives 5a−n. The configurations of these compounds were established by elemental analysis, IR, 1H NMR, mass spectra, and by their preparation from the corresponding 4-methyl benzoic acid 1 and chlorosulfonic acid. All these new compounds demonstrate significant in vitro antibacterial and antifungal activities against all bacterial and fungal strains.Korean Chemical Societyhttp://journal.kcsnet.or.kr/am201

Synthesis and characterization of new piperazine fused triazoles

103-109Reductive amination of 2-((tert-butyldimethylsilyl)oxy)acetaldehyde with 3-methoxyaniline gives N-(2-((tert-butyldimethylsilyl)oxy)ethyl)-3-methoxyaniline. The latter on Mannich reaction with 1-substituted acetylene and formaldehyde in presence copper iodide catalyst results in the formation of a propargylamine containing silyloxy group. This on treatment with stannous chloride gives a propargyl amine containing hydroxy group. The resulting alcohol is converted to a piperazine fused triazole. A new series of 3,5-disubstituted piperazine fused triazoles are synthesised and characterized by IR, 1H and 13C NMR, and mass spectral studies

Synthesis and biological evaluation of some new 2,5-disubstituted 1,3,4-oxadiazoles from 3-(arylsulfonyl) propanehydrazides

208-211Methyl acrylate on treatment with aryl thiols gives methyl 3-(arylthio) propanoates. The latter on oxidation with hydrogen peroxide followed by reaction with hydrazine hydrate gives 3-(arylsulfonyl) propanehydrazides. Two new series of 2,5-disubstituted-1,3,4-oxadiazoles from 3-[(4-chlorophenyl)sulfonyl] propane hydrazide and 3-[(4-methylphenyl)-sulfonyl] propane hydrazide have been synthesized and tested for antimicrobial activities. Some of these compounds have shown good antimicrobial activity

Synthesis and characterisation of diastereomeric (<i style="">E</i> & <i style="">Z</i>) vinylsulfides and vinylsulfones from <i style="">p</i>-tolylphenylacetylene

765-769The addition of p-methylbenzenethiol to p-tolyl­phenyl­acetylene results in the formation of a mixture of diastereomeric (E) & (Z)-1-(4-methylphenyl)-2-phenyl-1-[(4-methyl­phenyl)thio] ethylenes (1 and 2) and (E) & (Z)-2-(4-methylphenyl)-1-phenyl-1-[(4-methylphenyl)thio] ethylenes (3 and 4). The configurations of these compounds have been established by 1H NMR studies, by their preparation from benzyl p-tolyl ketone and p-methylbenzyl phenyl ketone, and by the oxidation of the thioethylenes 1, 2, 3 and 4 to the corresponding sulfonylethylenes 5, 6, 7 and 8 respectively