This class of compounds can be formed by using a catalyst based on fructose in a reaction between oxone and olefins, or by reacting a carbonyl compound with a sulfonium yllide. Besides the Shi and Johnson-Corey-Chaykovsky reactions, they can be enantio-selectively formed in either the Jacobsen or Sharpless reactions, while the most typical way to form them proceeds via the butterfly mechanism and is sometimes named for Prilezhaev. That reaction sees a peroxy- acid react with an alkene, and they 
This class of compounds can be formed by using a catalyst based on fructose in a reaction between oxone and olefins, or by reacting a carbonyl compound with a sulfonium yllide. Besides the Shi and Johnson-Corey-Chaykovsky reactions, they can be enantio-selectively formed in either the Jacobsen or Sharpless reactions, while the most typical way to form them proceeds via the butterfly mechanism and is sometimes named for Prilezhaev. That reaction sees a peroxy- acid react with an alkene, and they can also be formed by an intra-molecular Williamson ether synthesis. FTP name these highly strained compounds that can be opened or reduced into alcohols, defined as cyclic three-membered ethers.
This class of compounds can be formed by using a catalyst based on fructose in a reaction between oxone and olefins, or by reacting a carbonyl compound with a sulfonium yllide.
{epoxide}s [or {oxirane}s]