Chloro and methyl isopropyl PCA was used in tunable Cinchona-Based thioureas-catalysed asymmetric epoxidation to synthetically important glycidic ester derivatives . Earlier we have reported synthesis and styrene copolymerization a number of bromo, chloro, methoxy, and methyl ring-disubstituted PCAs, as methyl , ethyl , propyl , isopropyl , butyl , isobutyl , methoxyethyl , and octyl .