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The synthetic utility of this method is further demonstrated by versatile transformations of the Synthesis of New 5-Aryl-benzo[f][1,7]naphthyridines via a Cascade Process (Ugi-3CR/Intramolecular Aza-Diels-Alder Cycloaddition)/Aromatization.Nacional, Av. Acueducto de Guadalupe S/N, Barr. [http://www.allinno.com/product/cyclodextrin/683.html Seebio snac chemical] , Gustavo A Rafael Atlixco 186, Col. Vicentina, Iztapalapa C.P.<br /><br /> 09340, Ciudad de México, San Rafael Atlixco 186, Col. [https://en.wikipedia.org/wiki/SNAC salcaprozate] , Iztapalapa C.P. 09340, Ciudad de México, Rafael Atlixco 186, Col. Vicentina, Iztapalapa C.P. 09340, Ciudad de México, Rafael Atlixco 186, Col.<br /><br /> Vicentina, Iztapalapa C.P. 09340, Ciudad de México, Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán C.P. 04510, Ciudad de México, Rafael Atlixco 186, Col. Vicentina, Iztapalapa C.P.<br /><br /> 09340, Ciudad de México, Rafael Atlixco 186, Col. Vicentina, Iztapalapa C.P. 09340, Ciudad de México, Rafael Atlixco 186, Col. Vicentina, Iztapalapa C.P. 09340, Ciudad de México, A series of eight new 5-aryl-benzo[f][1,7]naphthyridines were synthesized in 17 to 64% overall yields via an improved MW-assisted cascade-like one pot process (Ugi⁻three component reaction/intramolecular aza-Diels-Alder cycloaddition) coupled to an aromatization process from tri-functional dienophile-containing ester-anilines, substituted benzaldehydes and the chain-ring tautomerizable 2-isocyano-1-morpholino-3-phenylpropan-1-one as starting reagents, under mild conditions.<br /><br /> The doubly activated dienophile and the aza-diene functionalities of the eight new Ugi-adducts were exploited to perform an in situ aza-Diels-Alder cycloaddition/aromatization (dehydration/oxidation) process, toward the complex polysubstituted 5-aryl-polyheterocycles, which could be taken as starting point for further SAR studies because the benzo[f][1,7]naphthyridine is the core of various bioactive products. It is relevant to emphasize that the synthesis or isolation of benzo[f][1,7]naphthyridines containing a substituted aromatic ring in the C-5 position, has not been published before.founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in Chemical and spectroscopic analysis of lignin in isolated flax fibers.The chemistry of pure flax fibers, free of contaminating nonfiber components, has not been determined. Fibers from the center sections of the stem of seed and fiber flax (Linum usitatissium L.), which had been retted after soaking in water and removal of the epidermis by hand, underwent chemical and spectroscopic analysis. Wet chemical analysis showed only trace indications of aromatics and no long chain fatty acids or alcohols in fibers.<br /><br /> Pyrolysis mass spectroscopy (PyMS) and pyrolysis gas chromatography mass spectrometry (PyGCMS) showed only trace amounts of aromatic constituents that could be attributed to the presence of lignin. Mid-infrared (Mid-IR) and Raman spectroscopy of these fibers showed no aromatic compounds present. This study suggests that earlier work reporting the presence of lignin ranging from 1 to 4% may be the result of residual shive or epidermis/cuticle material remaining after the retting process which may be responsible for the favorable properties desired by the composites industry.Photoreversible patterning of biomolecules within click-based hydrogels.Hughes Medical Institute, 424 UCB, Boulder, CO 80309-0424, USA. Angew Chem Int Ed Engl. 2012 Apr 23;51(17):4004-5.<br /><br />Cloning and functional characterization of arsenite oxidase (aoxB) gene associated with arsenic transformation in Pseudomonas sp. strain AK9.Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat 364002, Sabour, Bhagalpur-813210, Bihar, India.Pilani, K. K.<br /><br /> Birla Goa Campus, Sancoale, Goa 403726, India.Arsenic transforming bacterial strains belong to genus Pseudomonas sp.AK9 (KY569424), were isolated from the middle Gangetic plains of Bihar, India. The Pseudomonas sp. AK9 strains were able to transform toxic arsenite to a less toxic arsenate. In the present work, the presence of different arsenic resistance genes (aoxB, arsB, acr3 and aoxAB) were observed in isolated strain. Furthermore, the aoxB gene was amplified from genomic DNA of AK9, cloned in E.<br /><br />coli/DH5αcells, and sequenced. The BLASTn results and phylogenetic study of the aoxB gene showed 952&nbsp;% and 907&nbsp;% identity with the large subunit of aoxB gene of previous reported Thiomonas arsenivorans strain DSM16361 and Thiomonas arsenivorans strain b6, respectively. Further overhang primers were designed for amplifications of full length aoxB gene (∼1200&nbsp;bp), and cloned in to the expression vector and host E.coli/BL21 cells. The GST-aoxB gene was expressed in BL21 cells, and a profound expression product of&nbsp;∼&nbsp;72&nbsp;kDa was observed in SDS PAGE. The detection of a large subunit (aoxB) of arsenate oxidase protein in western blotting assay affirmed the expression of aoxB gene in recombinant E.coli/BL21 clone.<br /><br /> Further, the recombinant E.coli/BL21cells showed increased growth than the normal E.