Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter.91-00-9, Name is Diphenylmethanamine, SMILES is NC(C1=CC=CC=C1)C2=CC=CC=C2, belongs to amides-buliding-blocks compound. In a document, author is Filbey, F. M., introduce the new discover, COA of Formula: https://www.ambeed.com/products/91-00-9.html.
A catalytic one-step synthesis of peptide thioacids was developed. The oxygen-sulfur atom exchange reaction converted the carboxy group at the C-terminus of the peptides into a thiocarboxy group with suppressed epimerization. This method was successfully applied to the synthesis of the peptide drug leuprorelin via an iterative fragment-coupling protocol.
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 91-00-9 is helpful to your research. COA of Formula: https://www.ambeed.com/products/91-00-9.html.
Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics