Chemical synthesis is a type of enantioselective synthesis, often known as asymmetric synthesis. According to IUPAC, it is "a chemical reaction in which one or more new chirality elements are produced in a substrate molecule and which creates the stereoisomeric (enantiomeric or diastereomeric) products in uneven proportions." Simply said, it is the synthesis of a molecule using a technique that encourages the creation of a certain enantiomer or diastereomer. Enantiomers are stereoisomers with opposing arrangements at each chiral centre. Diastereomers are stereoisomers that vary at one or more chiral sites. As distinct enantiomers or diastereomers of a molecule frequently exhibit varied biological activities, enantioselective synthesis is a crucial procedure in contemporary chemistry and is particularly significant in the field of medicines.