Chemoselective transesterification and polymer synthesis using a zincate complex was written by Oshimura, Miyuki. And the article was included in Polymer Journal (Tokyo, Japan) in 2021.Product Details of 102-09-0 The following contents are mentioned in the article:
A review. In this focused review, I present an overview of our recent research on the zincate complex dilithium tetra-tert-butylzincate (TBZL)-catalyzed ring-opening polymerization (ROP) of 蔚-caprolactone, efficient acylation and transesterification of alcs. with vinyl acetate and carboxylic esters, and polymer synthesis with a high transesterification ability. In the first part of this report, the ROP of 蔚-caprolactone catalyzed by TBZL in toluene is described. In a subsequent study of the ROP of 蔚-caprolactone in the presence of 2-hydroxyethyl methacrylate (HEMA), TBZL was found to act not only as an anionic initiator but also as a transesterification catalyst. In the second part of this report, the acylation and transesterification of alcs. with vinyl acetate and carboxylic esters catalyzed by TBZL are summarized. The acylation proceeded quant. at 0掳C within 1 h. A wide range of combinations of esters and alcs. were suitable for the transesterification at 0 to -40掳C. In addition, the transesterification proceeded chemoselectively even in the presence of H2O and amines. Next, TBZL-catalyzed polycondensations of di-Ph carbonate (DPC) with diols are discussed. Irreversible polycondensations catalyzed by TBZL occurred to yield aliphatic polycarbonates under atm. pressure. In the last part of this report, the transesterifications of poly(Ph methacrylate) (PPhMA) side chains with alcs. catalyzed by TBZL are described. The transesterification reaction not only with alkyl alcs. but also with fluoroalcs. occurred. By changing the reaction solvent and temperature, the degree of conversion could be controlled. The present system permits the partial, quant., or terminal conversion of polymethacrylates. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Product Details of 102-09-0).
Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 102-09-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics