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chemical compound :: Heterocyclic compounds -- Britannica Online Encyclopedia Open preview window
Username Password ... Heterocyclic compounds include many of the biochemical materials essential to life. For example, nucleic acids, the chemical substances that carry the genetic information controlling inheritance, consist of long chains of heterocyclic units held together by other types of materials. ...
http://www.britannica.com/EBchecked/topic/108614/chemical-compound/79791/Heterocyclic-compounds | Open link in new window | More pages from www.britannica.com

Advances in Heterocyclic Chemistry, 64 - Elsevier SiteStat.jsp Open preview window
Home | / Site map | / Elsevier websites | / Alerts ... Every fifth volume ofAdvances in Heterocyclic Chemistry contains a cumulative subject index. ... M. Tisler and P. Kolar, Amino Acids as Synthons for Heterocyclic Compounds. G. Fischer, Tropones, Tropolones, and Tropylium Salts with Fused Heterocyclic Rings. ...
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Mass spectrometry of fatty acids - dimethyl disulphide derivatives Open preview window
The Lipid Library / Home / About lipids ... Most natural dienoic fatty acids have methylene-interrupted double bonds. ... These heterocyclic compounds can give characteristic and diagnostic spectra also, so that the technique continues to have some practical value. ... Christie, W.W. Structural analysis of fatty acids. ... [01/09/08]
http://www.lipidlibrary.co.uk/topics/dimedisu/index.htm | Open link in new window | More pages from www.lipidlibrary.co.uk

Isolation of carboxylic acids from fermentation broth - Patent 6777213 Open preview window
SEARCH: ... The substrate can also contain one or more carbon-carbon multiple bonds and/or one or more carboxylic or heterocyclic aromatic rings. ... Particularly preferred monocarboxylic acids are oleic acid and pelargonic acid. ... These acids will normally have a pKa in the range of from about 4 to about 5. ...
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PMR: Ruthenium Complexes Bearing N-Heterocyclic Carbene (NHC) Ligands Open preview window
... Chiral N-heterocyclic carbene modules open convenient ways of creating catalytic systems of high synthetic utility in organic synthesis. ... We cite here oxazolines arising from optically active amino acids, binaphthyl systems generating atropisomerism, and ferrocene affording planar chirality (17, 18). ...
http://www.platinummetalsreview.com/dynamic/article/view/49-4-183-188 | Open link in new window | More pages from www.platinummetalsreview.com

Nucleic acid - Wikipedia Open preview window
Nucleic acid / From Wikipedia ... Nucleic acids are found in all living cells and viruses. ... Each monomer consists of three components: a nitrogenous heterocyclic base, either a purine or a pyrimidine, a pentose sugar, and a phosphate group. ... Nucleic acids may be single-stranded or double-stranded. ... [25/04/06]
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Peteris TRAPENCIERIS Open preview window
... Research in different fields of aliphatic and heterocyclic unnatural amino acids. ... Unnatural amino acids. ... A convenient synthesis of 5b -cholestan-26-oic and 5b -cholestan-26,27-dioic acids Suna, E., Trapencieris, P. Chemistry of Heterocyclic Compounds(Engl.Ed.) 2000, 36(3), 287-300. ... Unnatural amino acids. ... [22/02/08]
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Loughborough University Department of Chemistry - Staff Open preview window
People in the Department / About Us ... As well as his developing own research in heterocyclic and natural product chemistry, he had collaborations with Professor Leslie Crombie. ... Synthesis and methodology towards natural products and analogues, with emphasis on those biogenetically derived from amino-acids. ... [16/07/08]
http://www.lboro.ac.uk/departments/cm/staff/jones.html | Open link in new window | More pages from www.lboro.ac.uk

Microwave Synthesis Open preview window
... Gold N-heterocyclic carbene complexes, in conjunction with a silver salt, were found to efficiently catalyze the rearrangement of allylic acetates under both conventional and microwave-assisted heating. ... Various aromatic, heteroaromatic and aliphatic carboxylic acids react under the conditions developed with good yields. ...
http://www.organic-chemistry.org/topics/microwave-synthesis.shtm | Open link in new window | More pages from www.organic-chemistry.org

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OBC Home Open preview window
... Amidine catalysed O- to C-carboxyl transfer of heterocyclic carbonate derivatives Caroline Joannesse, Carmen Simal, Carmen Concellón, Jennifer E. Thomson, Craig D. Campbell, Alexandra M. Z. Slawin and Andrew D. Smith, Org. ... These compounds were readily transformed into -chloro- , -unsaturated ketones and carboxylic acids or (Z)-haloallylic alcohols. ...
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