• alkenes
  • Electronic structure analyses of the corresponding transition structures showed that the preference of alkenes to alkynes is due to different bonding characteristics during this insertion process, namely, back donation for alkenes but donation for alkyne insertion, as evidenced by molecular graphics and NBO charge distributions. (rsc.org)
  • reaction
  • Thus, although b-borylalkenylcopper species were expected to exist as intermediates, further subsequent reaction of the alkenyl copper species with electrophiles has never been reported. (docme.ru)
  • While the reaction can be performed using commercial sources of copper(I) such as cuprous bromide or iodide, the reaction works much better using a mixture of copper(II) (e.g. copper(II) sulfate) and a reducing agent (e.g. sodium ascorbate) to produce Cu(I) in situ. (wikipedia.org)
  • Originally reported in 2004, phosphonium coupling proceeds via C-OH bond activation of a tautomerizable heterocycle with a phosphonium salt (PyBroP, PyBOP, BroP, or BOP), and subsequent functionalization with either a nucleophile through SNAr displacement or an organometallic through transition metal catalyzed cross coupling reaction. (wikipedia.org)
  • 6 The title transformation emerged from a wider search for transformations of synthetic utility employing our in situ enzymatic screening (ISES) approach to reaction discovery. (rsc.org)
  • The [ 18 F]triazoles were isolated following a Cu(I)-catalyzed click reaction between the alkynes and [ 18 F]fluoroethylazide. (springer.com)
  • aryl
  • Phosphonium coupling generates in situ a pseudo aryl or heteroaryl halide (the intermediate phosphonium species), and subsequently reacts with the other coupling partners under the suitable conditions. (wikipedia.org)
  • Han, Fu-She, PdCl2(dppf)-catalyzed in situ coupling of 2-hydroxypyridines with aryl boronic acids mediated by PyBroP and the one-pot chemo- and regioselective construction of two distinct aryl-aryl bonds, Chemical Communications (Cambridge, United Kingdom) (2011), 47(48), 12840-12842. (wikipedia.org)
  • halide
  • In situ infrared (IR) and X-ray absorption near-edge structure (XANES) spectroscopic investigations reveal that different halide ligands have distinct effects on the aerobic oxidation of Cu(i) to Cu(ii) in the presence of TMEDA (tetramethylethylenediamine). (jove.com)
  • 5) The addition of Grignard reagents to alkynes is facilitated by a catalytic amount of copper halide. (wikipedia.org)
  • cycloaddition
  • The in situ formation mechanisms of active Ni-carboryne species ( COM1 ) and subsequent alkene/alkyne Ni-C bond insertion priorities, as well as relevant cycloaddition regioselectivities and kinetics, were investigated using the IDSCRF-B3LYP density functional theory (DFT) method, and all atoms were equitably treated at the DGDZVP level. (rsc.org)
  • form
  • 8. The material according to claim 6 , wherein said organic material precursor in gaseous form is formed in situ during pyrolysis. (google.com)