• subsequent
  • Subsequent palladium-catalyzed reactions (Suzuki, Heck, Sonogashira, Stille) delivered, after cleavage, the desired molecules in moderate to good yields over four steps. (beilstein-journals.org)
  • In contrast, when the reactant is 2-phenylethylamine, it is possible to employ relatively apolar solvents with exclusive ortho- regioselectivity due to the intermediate formation of a chloramine making the subsequent reaction step intramolecular. (wikipedia.org)
  • This then allows for reaction with dioxygen and subsequent intradiol cleavage to occur through a cyclic anhydride intermediate. (wikipedia.org)
  • solvent
  • It also is helpful for optimizing a reaction with regard to variables such as temperature and choice of solvent. (wikipedia.org)
  • However, in the absence of a trapping electrophile or protic solvent, loss of the remaining halide from the enolate intermediate affords α-keto carbenes or carbenoids, which undergo C-H insertion reactions. (wikipedia.org)
  • The ortho to para selectivity is low: No reaction takes place when the solvent is replaced by tetrachloromethane. (wikipedia.org)
  • Reagents
  • Ideal to improve selectivity or to use highly reactive compounds such has organolithium reagents, we have can perform cryogenic reactions at pilot-scale (up to 700L) and at industrial-scale (up to 6,000L). We also developed a unique set of two large-scale reactors (3,000 L and 4,000 L) in series for coupling two low temperature reactions. (novasep.com)
  • Thanks to our know-how and capabilities in cryogenic reactions, we are able to manufacture large amounts of organolithium reagents. (novasep.com)
  • formation
  • Reaction of the isolable ferrocenyldichlorogermyl anion, Fc*GeCl 2 − (Fc* = 2,5-bis(3,5-di- t -butylphenyl)-1-ferrocenyl), with the isolable chalcogenenyl halides resulted in the formation of the corresponding organochalcogenyldichlorogermanes that were structurally characterized. (mdpi.com)
  • enzymes
  • It is a chemistry where most reactions are controlled by complex proteins called enzymes and are moderated and limited by hormones. (wikipedia.org)
  • Enzymes employ many different schemes to use dioxygen, and this largely depends on the substrate and reaction at hand. (wikipedia.org)
  • For example, in the α-ketoglutarate-dependent enzymes, one atom of dioxygen is incorporated into two substrates, with one always being α-ketoglutarate, and this reaction is brought about by a mononuclear iron center. (wikipedia.org)
  • benzene
  • The first such hydride, Cp2ZrH2, was developed in 1966 by M.G.H. Wallbridge in a reaction of (Cp)2Zr(BH4)2 with triethylamine in benzene as an uneventful insoluble solid. (wikipedia.org)
  • kinetics
  • In practice a molar equivalent of PBr3 is often used anyway to overcome the slow reaction kinetics. (wikipedia.org)
  • In these studies both the kinetics of the reaction and the preparative conditions for the iodination of strongly deactivated compounds, such as benzoic acid and 3-nitrobenzotrifluoride, were investigated. (wikipedia.org)
  • oxidation
  • This model protein was tailored for electrochemical studies of phenol oxidation and reduction with specific emphasis on the redox-driven protonic reactions occurring at the phenol oxygen. (biomedsearch.com)
  • cross coupling
  • Our ability to prepare aryl and vinyl triflates, chlorides and bromides as well as boronic acid derivatives in-house, gives us access to a wide selection of substrates at low cost for transition metal-catalyzed cross coupling reactions. (novasep.com)
  • chemists
  • The reaction is named after three chemists, the German chemists Carl Magnus von Hell (1849-1926) and Jacob Volhard (1834-1910) and the Russian chemist Nikolay Zelinsky (1861-1953). (wikipedia.org)
  • secondary
  • If the reaction is not terminated, but instead the radical group(s) go on to react further, the steps where new radicals are formed and then react is collectively known as propagation (4,5) because a new radical is created available for secondary reactions. (wikipedia.org)
  • chiral
  • Our ability to handle diborane from kilogram to multi-ton scale gives us access to several organoboranes (including chiral organoboranes), that can be used in many reactions. (novasep.com)
  • sodium
  • The food dye erythrosine can be synthesized by iodination of another dye called fluorescein: This reaction is driven by sodium bicarbonate. (wikipedia.org)
  • combustion
  • Typical types of change include neutralization (mixing an acid with a base, resulting in water and salt), oxidization including combustion, redox reactions etc. (wikipedia.org)
  • substrate
  • The most general form for the reaction may be given as where R-LG indicates the substrate. (wikipedia.org)
  • In such reactions, the nucleophile is usually electrically neutral or negatively charged, whereas the substrate is typically neutral or positively charged. (wikipedia.org)