Epoxidation of olefinic compounds with combined use of molecular oxygen and propionaldehyde diethyl acetal catalyzed by cobalt(II) complex. Efficient method for the preparation of acid-sensitive epoxides was written by Yorozu, Kiyotaka;Takai, Toshihiro;Yamada, Tohru;Mukaiyama, Teruaki. And the article was included in Chemistry Letters in 1993.SDS of cas: 15399-05-0 This article mentions the following:
Acid-sensitive epoxides such as epoxide of bishomoallyl alc. or chromene oxide were prepared by epoxidation of corresponding olefins with mol. oxygen and EtCH(OEt)2 catalyzed by cobalt(II) complex. Acid-sensitive silyl enol ethers and silyl ketene acetals were also smoothly monooxygenated to give the corresponding α-hydroxy carbonyl compounds Thus, treating PhC(:CH2)OSiMe3 with O2, EtCH(OEt)2 and Co(mac)2 (Hmac = MeCOCHMeCOMe) gave 83% PhCOCH2OH. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0SDS of cas: 15399-05-0).
Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.SDS of cas: 15399-05-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics