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Vijaykumar, B. V. D.,Premkumar, B.,Jang, Kiwan,Choi, Bong-In,Falck, J. R.,Sheldrake, G. N.,Shin, Dong-Soo The Royal Society of Chemistry 2014 GREEN CHEMISTRY Vol.16 No.5
<P>The design and synthesis of hemi-fluorinated perfluorooctanesulfonic acid (PFOS) alternatives is described using a Zn/CuI mediated Michael-type addition reaction in ionic liquids considering environmentally benign reaction conditions as well as products. One of the new potassium sulfonates showed promising surface tension activities when compared to that of the PFOS potassium salt.</P> <P>Graphic Abstract</P><P>Michael-type addition in imidazolium ionic liquids for the synthesis of bio-degradable and efficient alternatives to perfluorooctanesulfonic acid. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3gc42642d'> </P>
Meng, Li-Juan,Zuo, Hua,Vijaykumar, B.V.D.,Dupati, Gautam,Choi, Kyung-Min,Jang, Kiwan,Yoon, Yong-Jin,Shin, Dong-Soo Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
Optically active N-benzyl-2-methyl-2H-benzo[b][1,4]oxazin-3(4H)-ones and N-benzyl-2-methyl-2H-benzo[b][1,4]thiazin-3(4H)-ones with potential synthetic and pharmacological interest were prepared via Smiles rearrangement in conventional as well as microwave irradiation conditions in one-pot from inexpensive (S)-2-chloropropionic acid. Most of the compounds displayed good inhibition against Gram positive bacteria and fungi in the antibiotic test.
Deepak Kumar,Sridhar Chirumarry,B. V. D. Vijaykumar,S. J. Harshavardhan,장기완,이동하,신동수 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.4
An efficient synthesis of (3Z,6Z)-cis-9,10-epoxy-3,6-henicosadiene (1), the major component of sex pheromone of saltmarsh caterpillar moth Estigmene acrea (Drury), was accomplished from commercially available pentadec-3-yn-1-ol and bromoundecane. Chirality was introduced by employing Sharpless asymmetric dihydroxylation on cis-olefin intermediate in the synthesis of 1, for the first time. The other key reactions include metal-dissolving coupling, Lindlar's catalyst-assisted partial hydrogenation, one-pot, three-step epoxidation from vicinal diol, and Wittig olefination. The overall yield of 1 was 24.7% in eight steps. The efficiency and simplicity of this synthesis allow the potential use of pheromone 1 in pest management programs.
Li-juan Meng,Hua Zuo,B. V. D. Vijaykumar,Gautam Dupati,Kyung-Min Choi,장기완,윤용진,신동수 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.2
Optically active N-benzyl-2-methyl-2H-benzo[b][1,4]oxazin-3(4H)-ones and N-benzyl-2-methyl-2H-benzo [b][1,4]thiazin-3(4H)-ones with potential synthetic and pharmacological interest were prepared via Smiles rearrangement in conventional as well as microwave irradiation conditions in one-pot from inexpensive (S)-2- chloropropionic acid. Most of the compounds displayed good inhibition against Gram positive bacteria and fungi in the antibiotic test.
Synthesis of POSS Derived Organic-Inorganic Hybrid Esters for Insulating Oil Applications
Kyeong-min Choi,S. J. Harshavardhan,Ch. Sridhar,B. V. D. Vijaykumar,Deepak Kumar,장기완,이만식,신동수 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.9
In this work, a new family of polyhedral oligomeric silsesquioxanes (POSS) based esters have been synthesized that consists eight ester functional groups. These are classified into Type-I and Type-II esters based on the starting materials, octakis(3-chloropropyl)silsesquioxane (Cl-POSS) and octakis(3-hydroxypropyldimethylsiloxy) octasilsesquioxane (OHPS) respectively. These new POSS type ester moieties can be used as insulating oils and oil additives in the transformers and also considered to be alternatives to mineral and vegetable oils that are presently used in the insulation system.