Competitive Price of CAS 86728-85-0

Ethyl (S)-4-chloro-3-hydroxybutyrate​ CAS 86728-85-0 is a chiral, bifunctional ester and a highly valuable building block in asymmetric synthesis. It features a terminal chloro group, a secondary alcohol with defined (S)-stereochemistry, and an ethyl ester, providing three distinct reactive handles for chemical transformation from a single enantiomerically pure scaffold. This compound is a ​chirally pure, trifunctional building block​ that integrates a reactive ethyl ester, a stereodefined secondary alcohol, and a terminal chloride into a compact C4 skeleton. It is the ​preferred industrial precursor​ for synthesizing the chiral side chain of blockbuster statin drugs due to its optimal balance of reactivity, stability, and efficient biocatalytic production.