The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (S)-2-Bromosuccinic acid( cas:20859-23-8 ) is researched.Computed Properties of C4H5BrO4.Guerin, Philippe; Vert, Michel published the article 《Enantiomeric purity of R(+) and S(-) benzyl malolactonate monomers as determined by 250 MHz 1H nuclear magnetic resonance》 about this compound( cas:20859-23-8 ) in Polymer Communications. Keywords: benzylmalolactonate enantiomeric purity NMR; optical rotation benzyl malolactonate enantiomer; polybenzyl malate enantiomer melting temperature. Let’s learn more about this compound (cas:20859-23-8).
The title studies showed that the enantiomeric excess ≤95% could be retained during the 4-step synthesis route. A linear relation was obtained between optical rotation and enantiomeric composition of mixtures of optical isomers, as determined by NMR and optical polarimetry. Optically active poly(benzyl β-malate) derived from monomer mixtures with R(+)/S(-) ≥70/30 was crystalline and showed a melting temperature that varied with enantiomeric composition
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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”