Chhanda, Sadia Afrin; Itsuno, Shinichi published the artcile< Synthesis of cinchona squaramide polymers by Yamamoto coupling polymerization and their application in asymmetric Michael reaction>, SDS of cas: 112-63-0, the main research area is cinchona squaramide polymer catalyst preparation Yamamoto coupling; styrene anthrone copolymer catalyst enantioselective Michael addition reaction; phenylethyl anthracenone preparation.
Yamamoto coupling polymerization was used for the synthesis of polymeric chiral organocatalysts. Cinchona squaramide derivatives with dibromophenyl moiety were polymerized under the Yamamoto coupling conditions to afford the corresponding chiral polymers in good yields. Using this technique, novel cinchona alkaloid polymers containing the squaramide moiety were designed and successfully synthesized. In addition to the homopolymerization of cinchona squaramide monomers with a dibromophenyl group, achiral comonomers such as dibromobenzene were copolymerized with the cinchona monomers to yield chiral co-polymers. These chiral polymers were successfully utilized as polymeric catalysts in asym. Michael addition reactions. Good to excellent enantioselectivities were observed for different types of asym. Michael reactions. Using the chiral homopolymer catalyst I, almost perfect diastereoselectivity (>100:1) with 99% ee were obtained for the reaction between Me 2-oxocyclopentanecarboxylate and trans-β-nitrostyrene. The polymer catalysts developed in this study have robust structures and can be reused several times without a loss in their catalytic activities.
Reactive & Functional Polymers published new progress about Anthracenes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.
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