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In homogeneous catalysis, the catalyst is in the same phase as the reactant. 252978-89-5. 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.

An asymmetric nitrogen-oxygen ligand and Ti, Zr, Hf complex preparation method and application (by machine translation)

The invention discloses an asymmetric nitrogen-oxygen ligand and Ti, Zr, Hf complex preparation method and application. The complex preparation method comprises the following steps: in order to replace salicyldehyde and 2-ammonia methylpyridinio and containing different substituents shall phenol system asymmetric nitrogen-oxygen ligand; and the asymmetric nitrogen-oxygen ligand TiCl 4, ZrCl 4, HfCl 4 the reaction is carried out in toluene, containing asymmetric nitrogen oxygen multi-teeth ligand is Ti, Zr, Hf complex. This kind of complex is mainly used for ring-opening polymerization of lactide, has a high catalytic activity and good stereoselectivity. The ligand of this invention and Ti, Zr, Hf complex, easy availability of raw materials, the preparation method is simple, the structure is easy to modulation, ligand construction through the change, can adjust and control the nature of the complex, improve its catalytic performance, can be used for preparing molecular weight distribution is relatively narrow, the stereo regular the high molecular material of biodegradation and polylactide, is suitable for popularization. (by machine translation)

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.252978-89-5, you can also check out more blogs about252978-89-5

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