Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 3731-53-1, Name is Pyridin-4-ylmethanamine, SMILES is NCC1=CC=NC=C1, belongs to pyridine-derivatives compound. In a document, author is Takeuchi, Suzuka, introduce the new discover, SDS of cas: 3731-53-1.
Facile rare-earth triflate-catalyzed esterification of cellulose by carboxylic anhydrides under solvent-free conditions
We report here the facile rare-earth triflate-catalyzed esterification of cellulose by carboxylic anhydrides, including acetic anhydride, at room temperature under solvent-free conditions. As a model, D-glucose was peraceylated using only equimolar amounts of acetic anhydrides against hydroxyl groups to give the expected 1,2,3,4,6-pentaacetyl alpha-D-glucopyranoside (crude yield 98%, 68% yield after recrystallization) under solvent-free condition. In the case of powdery micmcrystalline cellulose, acetylation proceeded both in the absence of pyridine and solvent to give peracetylated cellulose, even in the bulk. From H-1 NMR measurements, the degree of substitution (DS) was 3.0 (100% acetylation) and we concluded that Sc(OTf)(3) -catalyzed solvent-free esterification of cellulose had taken place. The number-average molecular weight (M-n), calculated using the H-1 NMR intensity ratio based on the anomeric proton in the reducing terminus, was 1.7 x 10(4) (repeating unit of pyranose unit: 56).
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 3731-53-1 is helpful to your research. SDS of cas: 3731-53-1.
Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem