Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.SDS of cas: 102-09-0
Phosgene-free and Chemoselective Synthesis of Novel Polyureas from Activated L-Lysine with Diphenyl Carbonate was written by Yakeya, Daisuke;Yoshida, Yoshiaki;Endo, Takeshi. And the article was included in Macromolecules (Washington, DC, United States) in 2020.SDS of cas: 102-09-0 The following contents are mentioned in the article:
Nα,Nε-(Phenoxycarbonyl)-L-lysine Me ester 1a can be expected to behave as a difunctional blocked diisocyanate monomer derived from L-lysine with di-Ph carbonate. In this report, we examined a reaction of the obtained compound 1a and 1 equiv of n-butylamine as a model reaction to find that the Nα position of compound 1a reacted selectively with an amine. This means that the reactivity of Nα– and Nε-phenoxycarbonyl groups is different because the Nα-phenoxycarbonyl moiety has an adjacent ester group. From this result, synthesis of the corresponding polyureas was evaluated by a stepwise reaction of compound 1a with various diamines. The structure anal. and the study of thermal properties of the synthesized polyureas suggested that the carbodiimide moieties were partly constructed in the main chain because of the dehydration triggered by heat treatment of the polyureas. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0SDS of cas: 102-09-0).
Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.SDS of cas: 102-09-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics