Results 41 to 50 of about 17,373 (214)

Activation of 1,2- and 1,3-Ketoamides with Thiourea Organocatalyst for the Enantioselective Domino Synthesis of Fuctionalized Cyclohexanes

open access: yes, 2013
International audienceSeveral reactive sites of 1,2- and 1,3-ketoamides were successively exploited in two complementary domino transformations for the synthesis of polysubstituted monocyclic or bridged bicyclic cyclohexanes, with the creation of up to ...
Bonne, Damien   +7 more
core   +3 more sources

Selectively fluorinated cyclohexane building blocks : derivatives of carbonylated all-cis-3-phenyl-1,2,4,5-tetrafluorocyclohexane [PDF]

open access: yes, 2015
MA thanks the Egyptian Government for a Scholarship under the Channel Scheme and we are grateful to the support of Professor L. Fathey of the University of Alexandria, Department of Chemistry, Egypt.
Ayoup, Mohammed Salah   +3 more
core   +3 more sources

Fluorine containing amino acids : synthesis and peptide coupling of amino acids containing the all-cis tetrafluorocyclohexyl motif [PDF]

open access: yes, 2015
MA thanks the Egyptian Government for a Scholarship. DO’H thanks the Royal Society for a Royal Society Wolfson Research Merit Award.A synthesis of two (S)-phenylalanine derivatives is described which have the all-cis, 2,3,5,6-tetrafluorocyclohexyl motif ...
Ayoup , Mohammed Salah   +3 more
core   +1 more source

Phosphate Monoester Hydrolysis in Cyclohexane [PDF]

open access: yesJournal of the American Chemical Society, 2009
The hydrolysis of simple phosphate monoesters is among the most difficult reactions that are subject to catalysis by enzymes, and it has been suggested that extraction of the substrates from solvent water may contribute to the catalytic effects of phosphohydrolases.
Richard Wolfenden, Randy B. Stockbridge
openaire   +3 more sources

Formation and Identification of Unresolved Complex Mixtures in Lacustrine Biodegraded Oil from Nanxiang Basin, China

open access: yesThe Scientific World Journal, 2014
A comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GC × GC/TOFMS) method has been developed for the formation and identification of unresolved complex mixtures (UCMs) in lacustrine biodegraded oils that with the same ...
Pengfei Guo   +6 more
doaj   +1 more source

Structure of asphaltenes occurring in oils of different chemical nature

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2018
The relevance of the work is caused by the need to obtain and generalize information on composition and structure of asphaltene components in oils of different chemical nature, since the features of structural characteristics of asphaltenes have a ...
Tatyana Victorovna Cheshkova   +4 more
doaj   +1 more source

Recent Advances in Asymmetric Organocatalyzed Conjugate Additions to Nitroalkenes [PDF]

open access: yes, 2017
The asymmetric conjugate addition of carbon and heteroatom nucleophiles to nitroalkenes is a very interesting tool for the construction of highly functionalized synthetic building blocks.
Alonso, Diego A.   +6 more
core   +3 more sources

Emerging pharmacotherapy of tinnitus [PDF]

open access: yes, 2009
Tinnitus, the perception of sound in the absence of an auditory stimulus, is perceived by about 1 in 10 adults, and for at least 1 in 100, tinnitus severely affects their quality of life.
Ana Belén Elgoyhen   +43 more
core   +1 more source

The Radiolysis of Cyclohexane III. The Radiolysis of Cyclohexane-Cyclooctatetraene Mixtures

open access: yesNippon kagaku zassi, 1962
シクロヘキサンーシクロオクタテトラエン混合系のγ線分解を行ない,水素および低級炭化水素(C1~C4)ののG値を求め,シク覆ヘキサンの放射線分解に対するシクロオクタテトラエンのエネルギー移動効果を動力学的に検討した。その結果,シクロヘキサンから生ずるエチレンとプロピレンは分子過程によって生成し,その前駆体は ...
Shoji Shida   +3 more
openaire   +2 more sources

Particularly strong C-H...pi interactions between benzene and all-cis 1,2,3,4,5,6-hexafluorocyclohexane [PDF]

open access: yes, 2015
The authors thank EaStCHEM and the University of St Andrews for access to a computing facility managed by Dr H. Fruchtl, CNPq and FAPESP for the studentship for R.A.C. (#2011/01170-1, FAPESP) and for financial support (#2014/25903-6), as well as CNPq for
Buehl, Michael   +4 more
core   +1 more source

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