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, 1074-88-0, name is 1H-Indole-7-carbaldehyde, introducing its new discovery. Application In Synthesis of 1H-Indole-7-carbaldehyde
The reaction of 1-allyl-2-vinyl-1H-pyrroles and 1-allyl-2-vinyl-1H- indoles with arylsilanes in the presence of catalytic [Cp(TMS)2Y(mu-Me)]2 leads to highly selective cyclization/silylation events. In this process the active catalyst for the reaction, ‘Cp(TMS)2YH’, undergoes initial olefin insertion at the vinyl group. Even isopropenyl substituents on the heteroaromatics react in preference to less sterically encumbered allyl groups. Furthermore, the observed regioselectivity reflects an ‘aryl- directed’ process, whereby the more highly substituted secondary or tertiary organometallic is initially generated. This intermediate undergoes cyclization onto the remaining alkene and subsequent silylation by a sigma-bond metathesis reaction, affording the observed products.
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 1074-88-0 is helpful to your research. Application In Synthesis of 1H-Indole-7-carbaldehyde
Reference：
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