In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 252978-89-5, name is tert-Butyl 4-(1H-indol-4-yl)piperazine-1-carboxylate, introducing its new discovery. HPLC of Formula: C17H23N3O2
Group 3 metal initiators with an [OSSO]-type bis(phenolate) ligand for the stereoselective polymerization of lactide monomers
A series of 1,Iomega-dithiaalkanediyl-bridged bis(phenols) of the general type [OSSO]H2 with variable steric properties and various bridges were prepared. The stoichiometric reaction of the bis(phenols) 1,3-dithiapropanediyl-2,2′-bis(4,6-di-tert-butylphenol), 1,3-dithiapropanediyl- 2,2′-bis[4,6-di(2-phenyl-2-propyl)phenol], rac-2,3-trans-propanediyl-1,4- dithiabutanediyl-2,2′-bis[4,6-di(2-phenyl-2-propyl)phenol], rac-2,3-trans- butanediyl-1,4-dithiabutane diyl-2,2′-bis[4,6-di(2-phenyl-2-propyl)phenol], rac-2,3-trans-hexanediyl-1,4-dithiabutanediyl-2,2′-bis[4,6-di(2-phenyl-2-propyl) phenol], 1,3-dithiapropanediyl-2,2′-bis[6-(1-methylcyclohexyl)-4-methylphenol] (C1, R=1-methylcyclohexyl), and 1,4-dithiabutanediyl-2,2′-bis[6-(1- methylcyclohexyl)-4-methylphenol] with rare-earth metal silylamido precursors [Ln{N(SiHMe2)2}3(thf)x] (Ln=Sc, x=1 or Ln=Y, x=2; thf=tetrahydrofuran) afforded the corresponding scandium and yttrium bis(phenolate) silylamido complexes [Ln(OSSO){N(SiHMe2) 2}(thf)] in moderate to good yields. The monomeric nature of these complexes was shown by an X-ray diffraction study of one of the yttrium complexes. The complexes efficiently initiated the ring-opening polymerization of rac- and meso-lactide to give heterotactic-biased poly(rac-lactides) and highly syndiotactic poly(meso-lactides). Variation of the ligand backbone and the steric properties of the ortho substituents affected the level of tacticity in the polylactides. Copyright
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 252978-89-5 is helpful to your research. HPLC of Formula: C17H23N3O2
Reference£º
Indole alkaloid derivatives as building blocks of natural products from?Bacillus thuringiensis?and?Bacillus velezensis?and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles