The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine, molecular formula is C21H12F9P. In a Article，once mentioned of 13406-29-6, Computed Properties of C21H12F9P
The hydroformylation of Delta4- and Delta5-steroids, namely cholest-4-ene (1), 3beta-acetoxycholest-4-ene (2), 3beta-acetoxycholest-5-ene (3), and 3beta-acetoxypregn-5-en-20-one (4), was studied using rhodium catalysts modified with P-donor ligands containing electron withdrawing substituents, such as tris(o-tert-butylphenyl)phosphite, tris(o-trifluoromethylphenyl)phosphine and tris(p-trifluoromethylphenyl)phosphine. The effect of temperature, pressure and ligand/Rh molar ratios on the regio- and stereoselectivity of the reaction were studied. Under the reaction conditions assayed, only the Delta4-steroids 1 and 2 are hydroformylated, producing the 4-formyl derivatives with 100 % regioselectivity and 70 and 60 % stereoselectivity for the beta isomer, respectively. Delta5-Steroids 3 and 4 either did not react or produced traces of products from the isomerization of the double bond. Among the three catalysts used, only the Rh/tris(o-tert-butylphenyl)phosphite was able to catalyze the hydroformylation of Delta4-steroids. The two new formyl steroids obtained from 1, 4-formyl-5alpha-H-cholestane (6) and 4-formyl-5beta-H-cholestane (7), were isolated as their acetal derivatives and fully characterized by 2D NMR techniques. The structure of the acetal arising from the minor aldehyde product of the reaction was further corroborated by X-ray analysis. The mechanism of the reaction for the conversion of 3beta-acetoxycholest-4-ene 2 into 7 was investigated, through the hydroformylation of (1R)-(-)-myrtenyl acetate (5) as a cyclic allylic acetate model. The results show that the reaction does not take place through an allylic intermediate, but that the major aldehyde obtained from 2 undergoes AcOH elimination followed by stereoselective hydrogenation of the alpha,beta-unsaturated aldehyde, leading to 7.
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 13406-29-6 is helpful to your research., Computed Properties of C21H12F9P
Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate