Reference of 1034-39-5, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 1034-39-5, Name is Dibromotriphenylphosphorane, molecular formula is C18H15Br2P. In a Article，once mentioned of 1034-39-5
Reactions of N-monosubstituted benzamides with Ph3PBr2 and Et3N in refluxing CH2Cl2 for 0.5 – 5 hours give good yields of N,N’-disubstituted-N-acylamidines.The latter compounds may be regarded as intermolecular N-imidoylation products of the amide group.Under the same reaction conditions, N-monosubstituted amides containing C-H bonds adjacent to the carbonyl function and N-monosubstituted formamides are dehydrated to ketenimines and isonitriles, respectively.Treatment of N-methyl-benzamide with Ph3PBr2 and Et3N leads to the formation of an intermediate whose ir spectrum is consistent with the N,N,N-triethyl-N’-methylbenzamidinium salt structure.A substance with identical spectroscopic characteristics was obtained on treatment of N-methyl-alpha-bromobenzylideneammonium bromide with Et3N.Products of the reaction of 5- and 6-membered lactams with Ph3PBr2 and Et3N are inactive as imidoylating agents; consequently, these lactams do not undergo self-condensation to N-imidoylation products, but they can participate in the imidoylation reactions as nucleophiles subjected to imidoylation.In contrast to the 5- and 6-membered lactams, epsilon-caprolactam undergoes self-condensation to the expected N-imidoylation product.Possible mechanistic pathways for the imidoylation reaction of the amide group have been suggested.
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 1034-39-5 is helpful to your research., Reference of 1034-39-5
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