Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 31181-90-5, Name is 5-Bromopicolinaldehyde, SMILES is O=CC1=NC=C(Br)C=C1, belongs to pyridine-derivatives compound. In a document, author is Shkoor, Mohanad, introduce the new discover, Application In Synthesis of 5-Bromopicolinaldehyde.
Synthesis of 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles and features of their NMR spectra
Two different methods leading to 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles were investigated. Reactions of 3-aminocrotonirile with substituted salicylaldehydes provided 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles with the same substituent on positions 2 and 4 of the system. The reaction of 3-aminocrotonirile with variety of substituted 3-acetylcoumarins lead to 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles with different substituents on positions 2 and 4. The structures of the products were confirmed by spectroscopic methods. The presence of nitrile moiety in the structures with fixed geometry caused the highly downfield shift of the aromatic proton at position 10 in H-1 NMR spectrum. The electronic factor of the substituents caused variation of this downfield shift.
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 31181-90-5 is helpful to your research. Application In Synthesis of 5-Bromopicolinaldehyde.
Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem